Zebra MC9300 troubleshooting guide: errors, faults and fixes

Short answer: For Zebra, this flashing indicates a charging error: battery too cold or too hot, or charging that does not complete after around eight hours. Let the MC9300 return to a temperature between 0 and 40 °C, then place it back in its cradle.

Likely cause

The charging light table in the MC93XX guide associates fast-flashing red with two situations: a temperature out of range, or an abnormally long charging time (generally 8 hours). The Android 10 guide specifies that the batteries charge between 0 and 40 °C and that at around +37 °C charging may be alternately enabled and disabled to protect the battery.

What to do

1. Take the mobile computer out of the cradle and wait for it to return to room temperature, particularly after coming out of a cold room.
2. Install the cradle in a room between 0 and 40 °C, away from any heat source.
3. Slide the mobile computer into the slot and press lightly to ensure contact.
4. If the error reappears, check the battery's condition in Battery Manager (see worn battery).

When to call a technician: the charging error persists at normal temperature, with another battery and in another cradle.

Sources: Charging Indicators (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Charging the Battery (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 10 (MN-003904-03EN Rev A, PDF) (official documentation).

Short answer: According to Zebra, solid red indicates a worn battery that has reached the end of its useful life, whether charging is in progress or complete. Check its wear in Battery Manager and plan to replace it.

Likely cause

Battery Manager tracks the wear of each battery. By default, Zebra sets the decommission threshold at 80% and turns the Wear bar red when wear exceeds 80%.

What to do

1. Swipe up from the home screen and launch Battery Manager.
2. Look at the Wear bar, the Health status and the Decommission indicator.
3. In Advanced info, compare Battery health percentage with the decommission threshold (80% by default).
4. Replace the battery if it has passed this threshold (see replacing the battery).

Sources: Charging Indicators (opens in a new window) · Battery Manager (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: An amber flash every 3 seconds indicates either a completely flat battery, still unable to power the mobile computer, or the hot swap mode that follows battery removal. Let it charge, or reinsert a battery within 5 minutes.

Likely cause

During a hot swap, the MC9300 maintains connectivity and memory thanks to its SuperCap, which must have been charged for at least 15 minutes to perform this role.

What to do

1. Flat battery: leave the mobile computer in the powered cradle until the light changes to solid amber.
2. Battery removed: put a charged battery back within 5 minutes, the time during which the RAM is retained.

Sources: Charging Indicators (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · LED Charge Indicators (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 10 (MN-003904-03EN Rev A, PDF) (official documentation).

Short answer: The MC93XX guide lists four causes: battery too low to start but still retaining data, faulty battery, mobile computer removed from the cradle while charging, or battery at an extreme temperature. Recharge or replace the battery, at a temperature between 0 and 40 °C.

Likely cause

In the Zebra troubleshooting table, this symptom is dealt with separately from a completely dead mobile computer. The first cause cited is a low battery that still retains data; next come a battery that no longer recharges, interrupted charging and an extreme battery temperature.

What to do

1. Put the mobile computer back in the cradle: according to the guide, the 7,000 mAh battery fully recharges in less than 5 hours at room temperature.
2. Do not remove the mobile computer before charging is complete.
3. If the battery has been exposed to cold or heat, bring it back to between 0 and 40 °C: outside this range, it does not charge.
4. If it still does not charge, replace it; if the mobile computer stays off with another battery, reset it (see restart and hard reset).

When to call a technician: the MC9300 does not start with a new, charged battery, even after a hard reset.

Source: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide (official documentation).

Short answer: The MC93XX guide explains it as a battery that is not latched properly, a contact disturbed after vibration or a fall of more than 2.4 m, or a damaged communication pin. Remove the battery and put it back; if the error persists, install a new battery.

Likely cause

Three causes in the Zebra troubleshooting table: battery not inserted correctly, environment subject to vibration or a fall of more than 2.4 m (8 feet), damaged battery communication pin.

What to do

1. Release the battery with the two primary latches, then with the secondary latches on its sides.
2. Reinsert it and press until the two side latches click.
3. Switch back on with Power.
4. If the message returns, Zebra states that you should remove the battery and insert a new one.

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Replacing the Battery (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: According to Zebra, the “Memory full” message comes from too many saved files or too many user-installed applications. Delete or transfer the files, and uninstall unneeded applications from Storage.

Likely cause

The MC93XX guide attributes the full memory to two causes: too many files kept on the mobile computer, or too many applications added by the user.

What to do

1. Delete the memos and records you no longer need, or copy them to the host computer or to an SD card.
2. Open Storage > FREE UP SPACE > REVIEW RECENT ITEMS, tick the unused programs and touch FREE UP.

Source: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide (official documentation).

Short answer: According to the MC93XX guide, no scanning application is loaded or DataWedge is not enabled, the barcode is damaged, the distance is not suitable, or the mobile computer is not programmed for this type of barcode. Enable DataWedge, position yourself within the scanning range and enable the symbology in the profile.

Likely cause

With an imager (SE4750, SE4770, SE4850), a red crosshair appears when Scan is pressed, supplemented by an aiming dot for very bright environments; a successful scan turns the scan lights green and triggers a beep, by default. The SE965 laser has its own symptom (see the laser does not come on).

What to do

1. Place the cursor in an input field of the application.
2. Point the exit window at the barcode and press and hold Scan (trigger or centre button).
3. If no beam appears, check that a scanning application is loaded or that DataWedge is enabled: DataWedge profile list > menu > Settings > DataWedge enabled ticked. Failing that, contact the system administrator.
4. Adjust the distance: each engine has its working range; move closer for a dense barcode, further away for a large barcode.
5. Enable the barcode type in the DataWedge profile (Configure scanner settings > Decoders) or via the EMDK.
6. Check the label: a damaged barcode may remain unreadable.

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Scanning with the Internal Imager (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · DataWedge Settings (opens in a new window) – DataWedge (Zebra TechDocs) · Barcode Input (opens in a new window) – DataWedge (Zebra TechDocs) (official documentation).

Short answer: The MC93XX guide blames a low battery: the scanner turns off even before the low battery notification appears. Check the battery level and recharge; if the laser stays off, contact your distributor or Zebra support.

Likely cause

The Zebra troubleshooting table specifies that the scanner stops working before the low battery alert is displayed. With the SE965 laser engine, scanning is done with a red line that must cross all the bars and spaces of the barcode.

What to do

1. Check the battery level in Battery Manager or in the quick access panel.
2. Recharge or swap the battery, then try again.
3. When scanning, pass the red line across the full width of the barcode, including bars and spaces; the green light and a beep confirm the scan.
4. Check in the DataWedge profile that Hardware Trigger is ticked (default setting): otherwise, the trigger does not activate the beam.

When to call a technician: the laser still does not come on with a charged battery: the Zebra guide then refers you to the distributor or to Zebra's Global Customer Support Center.

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Scanning with the Internal Laser Scanner (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Barcode Input (opens in a new window) – DataWedge (Zebra TechDocs) (official documentation).

Short answer: Check your MC9300's scan engine: the SE965 is a 1D laser, limited to linear barcodes. 2D codes such as QR Code require an imager (SE4750, SE4770 or SE4850); on these models, check that the symbology is enabled in DataWedge.

Likely cause

Zebra offers the MC9300 with several engines: SE965 (1D laser, standard range), SE4750 and SE4770 (omnidirectional 1D/2D imagers, standard range), SE4750 DPM (direct part marking) and SE4850 (long-range 1D/2D imager, stated as 3 inches to 70 feet, i.e. about 7.6 cm to 21.3 m).

What to do

1. Identify the engine when you press Scan: the SE965 projects a red line, the imagers a red aiming crosshair.
2. With an SE965, only 1D barcodes can be read. On configurations fitted with a rear camera, the Zebra data sheet states that it can also read barcodes.
3. With an imager, check in the DataWedge profile that QR Code is ticked in Decoders: it is one of the decoders enabled by default.
4. For codes marked directly on parts, Zebra provides the SE4750 DPM version.

Sources: MC9300 Handheld Mobile Computer Specification Sheet (opens in a new window) – MC9300 data sheet (Zebra) · Scanning with the Internal Laser Scanner (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Barcode Input (opens in a new window) – DataWedge (Zebra TechDocs) (official documentation).

Short answer: First check the version: according to the Zebra data sheet, the standard MC9300 operates from -20 to +50 °C and the Freezer version from -30 to +50 °C, with a heated scan window and a battery suited to the cold. On a Freezer model, check that the window heating is enabled in Heater Control.

Likely cause

Only the Freezer configuration is designed for intense cold: heated exit window, Freezer battery, display optically bonded to the touch panel and Heater Control application. The data sheet describes it as condensation resistant.

What to do

1. Identify the configuration: the Heater Control application only exists on the Freezer version.
2. With a standard model, stay within the range of -20 to +50 °C.
3. With a Freezer model, check in Heater Control that Scanner Window is enabled (see window heating).
4. Take into account the thresholds of the Freezer battery, which warns from 30% (see battery thresholds).
5. Do not put a mobile computer that is still frozen on charge: below 0 °C, the battery does not charge.

Sources: MC9300 Handheld Mobile Computer Specification Sheet (opens in a new window) – MC9300 data sheet (Zebra) · Configurations (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Heater Control (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 10 (MN-003904-03EN Rev A, PDF) · Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide (official documentation).

Short answer: If scanning works in DWDemo but not in your application, no DataWedge profile is sending the data to it. Associate a profile with the application, with the Barcode input and a Keystroke or Intent output, or configure Profile0.

Likely cause

DataWedge, installed and enabled by default on the MC9300, applies to each application the profile associated with it; applications without a profile go through Profile0. This default profile makes the beam appear without transmitting the data until it is configured.

What to do

1. Scan a barcode in the DataWedge Demonstration application: if it receives it, the scanner is working.
2. In DataWedge, create a profile for your application and associate it (an application can only belong to one profile).
3. Enable the Barcode input and the appropriate output: Keystroke for keyboard-style input, Intent for an application that uses Android intents.
4. On managed mobile computers, report the problem: Profile0 may have been disabled to block scanning in unintended applications.

Sources: Frequently Asked Questions (opens in a new window) – DataWedge (Zebra TechDocs) · DataWedge Profiles (opens in a new window) – DataWedge (Zebra TechDocs) · DataWedge (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: Two DataWedge settings are involved. Without Basic Data Formatting, the barcode is sent without an Enter key: tick Send ENTER key. If characters are missing, increase Inter-character delay in steps of 100 ms, up to 1,000 ms.

Likely cause

By default, DataWedge transmits the raw data, without prefix or suffix, and simulates keystrokes without any delay between characters (value 0). Some applications then lose keystrokes; Zebra warns that a longer delay can slow down the application.

What to do

1. Open the application's DataWedge profile.
2. To validate each scan: enable Basic Data Formatting and tick Send ENTER key, or Send TAB key to move to the next field.
3. To add text before or after the barcode: Prefix to data and Suffix to data.
4. For lost characters: in Keystroke Output, set Inter-character delay to 100 ms, then increase it gradually without exceeding 1,000 ms.

Sources: Basic Data Formatting (opens in a new window) · Keystroke Output (opens in a new window) – DataWedge (Zebra TechDocs) (official documentation).

Short answer: The Zebra troubleshooting table gives two causes: Wi-Fi radio turned off, or mobile computer out of range of an access point. Re-enable Wi-Fi, move closer to an access point, then choose the network in Settings > Network & internet > Wi-Fi.

Likely cause

According to the Zebra data sheet, the MC9300 uses an 802.11 a/b/g/n/ac 2x2 MU-MIMO Wi-Fi radio, on 2.4 and 5 GHz. According to the guide, missing or incomplete data comes from a disabled radio or insufficient coverage; on a secure network, the password or credentials must be obtained from the system administrator.

What to do

1. Open Settings > Network & internet > Wi-Fi: the mobile computer searches for nearby wireless networks and displays them.
2. Scroll through the list and select the network you want.
3. Open network: touch it once, or touch and hold it and choose Connect. Secure network: enter the password or credentials provided by the administrator, then Connect.
4. The mobile computer obtains its address and network parameters via DHCP; Connected is displayed under the network once the link is established.
5. If transmissions fail when you move around, move closer to an access point and resend.

For a static IP address, the guide refers to the “Configuring the Device to Use a Static IP Address” procedure.

Sources: Connecting to a Wi-Fi Network (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 · Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · MC9300 Handheld Mobile Computer Specification Sheet (opens in a new window) – MC9300 data sheet (Zebra) (official documentation).

Short answer: According to the MC93XX guide, the device is more than 10 metres away, switched off, or not in discoverable mode. Move closer, switch the device on and put it in discoverable mode by following its documentation.

Likely cause

The Zebra table also cites a Bluetooth radio that is turned off when data arrives incorrectly. The Zebra Bluetooth scanners supported by the MC9300 (RS507/RS507X, RS5100, RS6000, LI3678, DS2278, DS3678) must be paired with the mobile computer before they can scan. A Bluetooth connection can turn the notification light blue.

What to do

1. Enable Bluetooth on the mobile computer.
2. Stay within 10 metres (32.8 feet) of the other device.
3. Switch the device on and put it in discoverable mode.
4. For a Zebra scanner, pair it before the first scan; on configurations fitted with NFC, pairing can be done by contact (Tap to Pair).

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Data Capture (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Configurations (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: For Zebra, the mobile computer was removed from the cradle or disconnected during the exchange, the cable is incorrectly configured, or the communication software is incorrectly installed. Put the mobile computer back in the cradle or reconnect the cable, then restart the transmission.

Likely cause

The MC93XX troubleshooting table cites three causes: a disconnection during communication, an incorrect cable configuration and communication software incorrectly installed or configured.

Caution: Before unplugging the USB cable, follow the computer's disconnection procedure so as not to lose data, as Zebra requests.

What to do

1. Put the mobile computer back in the cradle or reconnect the cable, then resend the data.
2. Do not remove the mobile computer during transmission.
3. If the cable or its configuration is the cause, contact the system administrator.
4. If the communication software is incorrectly installed or configured, reinstall it.

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · USB Communication (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: A charging light that is off means that the battery is not charging: mobile computer not pushed fully into the cradle or cradle without power. Check the cradle's connection, slide the mobile computer into its slot and press lightly to ensure contact.

Likely cause

Zebra cites a mobile computer incorrectly positioned, a cradle not powered, a faulty battery or a battery outside the charging range. The Android 10 guide states that batteries should be charged between 0 and 40 °C. While charging, the light changes to solid amber, then to solid green once charging is complete.

What to do

1. Check that the cradle is connected to its power supply.
2. Slide the mobile computer into the slot, then press gently to ensure contact; the charging light then shows the battery status.
3. For a spare battery: plug in the charger, insert the battery in a slot and press lightly; the lights on the front of the charger show the charging status.
4. If nothing changes, try another battery: Zebra asks you to replace a faulty battery.

Sources: Charging the Battery (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Charging the Spare Battery (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Charging the Battery (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 10 (MN-003904-03EN Rev A, PDF) · Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide (official documentation).

Short answer: The MC9300 Freezer battery has its own thresholds: warning at 30%, recharge required at 20%, shutdown at 6%. The standard battery warns at 15% and requires recharging at 9%, with the same shutdown at 6%.

Likely cause

Zebra fits the Freezer version with a 5,000 mAh battery suited to the cold, compared with 7,000 mAh for the standard battery, and applies higher notification thresholds to it.

What to do

1. Check the level in Settings > About phone > Battery Information, or in Battery Manager.
2. Open the quick access panel (two fingers down from the status bar) to see the percentage next to the battery icon.
3. Recharge at the first warning, or hot swap the battery (see replacing the battery).

Sources: Low Battery Notification (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Checking Battery Status (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · MC9300 Handheld Mobile Computer Specification Sheet (opens in a new window) – MC9300 data sheet (Zebra) (official documentation).

Short answer: The MC9300 retains its RAM for around 5 minutes once the battery is removed (Hot Swap mode). Press the two primary latches, then the side latches, take out the battery, insert a charged one until it clicks and press Power.

Likely cause

As soon as the battery comes out, the display turns off and the mobile computer goes into a low-power state that preserves the data in RAM for around 5 minutes.

Step by step

1. Press the two primary latches: the battery comes partially out.
2. Press the secondary latches on the sides and remove the battery.
3. Align the charged battery with the compartment, push it in and press firmly until the two latches engage with a click.
4. Press Power to switch the mobile computer back on.
5. Complete the whole operation in less than 5 minutes so as not to lose the memory.

This retention relies on the SuperCap, which must have charged for at least 15 minutes; during the swap, the light flashes amber every 3 seconds.

Sources: Replacing the Battery (opens in a new window) · Charging Indicators (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: Zebra cites two causes: the display going to sleep after a period of inactivity, and an exhausted battery. Set the delay in Settings > Display > Screen timeout, or replace the battery if the mobile computer has actually shut down.

Likely cause

The display sleep delay is adjustable; Zebra gives 30 minutes as the default. In addition, the mobile computer shuts down by itself when the battery drops to 6%.

What to do

1. Briefly press Power: if the display comes back, it was only asleep.
2. Open Settings > Display > Screen timeout and choose 15 or 30 seconds, 1, 2, 5, 10 or 30 minutes, or Never.
3. If the mobile computer does not switch back on, the battery is flat: replace it with a charged battery.

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Display Settings (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Low Battery Notification (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: Zebra provides an Enterprise Reset file to be copied to the root of a microSD card. Restart the MC9300 while holding the trigger until it vibrates, then choose Apply upgrade from SD card, Full OTA Package and the file. All user data in the /data partition is erased.

Likely cause

The MC93XX guide distinguishes four resets: the soft reset when applications no longer respond, the hard reset when the mobile computer no longer responds, the Enterprise Reset and the Factory Reset. The Enterprise Reset erases all user data in the /data partition, including primary storage (/sdcard and emulated storage).

Caution: The Enterprise Reset erases all user data in the /data partition, including /sdcard and emulated storage: back it up first. Handle the microSD card while observing the anti-static precautions required by Zebra.

Step by step (Enterprise Reset via microSD card)

1. Preferably format the microSD card on the mobile computer before using it, as Zebra recommends.
2. Download the appropriate Enterprise Reset file from the Zebra Support & Downloads website (zebra.com/support) and copy the .zip file to the root of the card: from the computer before installing the card, or by connecting the mobile computer, already fitted with its card, to the computer.
3. Press and hold Power until the menu appears, touch Restart, then press and hold the trigger until the mobile computer vibrates: the System Recovery screen appears.
4. Using the up and down keys, select Apply upgrade from SD card and press Enter; do the same for Full OTA Package.
5. Select the Enterprise Reset file and press Power: the reset runs, then the mobile computer returns to the Recovery screen.
6. Press Power to restart.

The guide also describes the Enterprise Reset via ADB (USB debugging enabled, file sent from the computer with adb sideload) and a Factory Reset, via microSD card or via ADB, using separate procedures.

Sources: Resetting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 · Performing an Enterprise Reset Using microSD Card (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 · Performing an Enterprise Reset Using ADB (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 · Installing a microSD Card (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: In DataWedge, open the menu, then Settings, touch Restore and confirm with Yes. All custom profiles and settings are permanently lost: export the configuration first if you want to keep it.

Likely cause

The restore only affects DataWedge: it returns all user-configured parameters to their factory values. Zebra offers the same action through the Restore Config API.

Caution: The operation cannot be undone, Zebra warns; an import also replaces all DataWedge profiles and settings.

Step by step

1. Backup: in DataWedge, menu > Settings > Export; the datawedge.db file is placed by default in the Download folder of the internal storage.
2. Restore: touch Restore, then Yes.
3. To deploy a reference configuration, use Import instead.

Source: DataWedge Settings (opens in a new window) – DataWedge (Zebra TechDocs) (official documentation).

Short answer: The Zebra guide cites a battery that is not charged, a battery that is not installed correctly or a system crash. Charge or replace the battery, check that it is properly latched, then perform a hard reset by pressing and holding Power for at least 16 seconds.

Likely cause

The MC93XX troubleshooting table distinguishes this case, where nothing lights up, from the one where the light flashes without the device starting. Here, the three causes cited are the battery charge, its installation and a system freeze.

What to do

1. Keep your finger on Power for a few seconds: the MC9300 switches on with a long press.
2. Check the battery: push it in until the two side latches return to position with a click.
3. Charge it in the cradle, or replace it with a charged battery.
4. If the light flashes without the mobile computer starting, see light flashing, mobile computer off.
5. If the system has frozen, perform a hard reset (see restart and hard reset).

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Installing the Battery (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Performing a Hard Reset (opens in a new window) – MC93XX Mobile Computer Product Reference Guide (official documentation).

Short answer: On the MC9300, the hard reset is done with the Power button alone: press and hold it for at least 16 seconds and release as soon as the Zebra logo appears. If the system is still responding, a simple restart is preferable: long press on Power, then Restart.

Likely cause

The MC93XX guide reserves the soft reset for applications that no longer respond and the hard reset for a mobile computer that no longer responds; its troubleshooting table calls for a reset when the on-screen buttons and icons no longer have any effect, or after a system crash.

Caution: According to Zebra, a hard reset performed while a USB flash drive is connected to the mobile computer can damage the drive or corrupt its data.

Step by step

1. Simple restart: press and hold Power until the menu appears, then choose Restart.
2. Hard reset: press and hold Power for at least 16 seconds.
3. Release the button as soon as the Zebra logo appears; the mobile computer restarts.

Sources: Resetting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 · Performing a Hard Reset (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Device Features (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: The Heater Control application, available only on Freezer configurations, displays the temperature, the humidity and the heating status. The Scanner Window option, enabled by default, must stay enabled; the TEST HEATER test is started from the Advanced tab, at an ambient temperature below +30 °C.

Likely cause

According to Zebra, heating the scanner exit window maintains optimum scanning performance in a cold room. The guide asks you to leave the Scanner Window option enabled so that the heating works correctly.

Step by step

1. Open Heater Control from the list of applications.
2. Status tab: read the temperature and humidity readings, and check that Scanner Window is ticked.
3. Advanced tab: check that the window heating has not been disabled, then touch TEST HEATER in a room below +30 °C (86 °F).
4. To keep a record, enable Logging: the readings are saved in .csv format in /sdcard/HeaterLogs.

Sources: Heater Control (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Heater Control (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 10 (MN-003904-03EN Rev A, PDF) (official documentation).

Short answer: The MC9300 has touch modes dedicated to gloves and to the stylus. Open Settings > Display > Advanced > TouchPanelUI and choose Glove and Finger, in the Screen Protector ON version if a film protects the display.

Likely cause

The Android 11 guide offers five settings: Stylus and Finger or Glove and Finger, each with Screen Protector OFF or Screen Protector ON, and Finger Only.

Step by step

1. Open Settings > Display > Advanced > TouchPanelUI.
2. Select the mode that matches your use: gloves, stylus or finger only, with or without a protective film.
3. If the display no longer responds to any touch, the Zebra table recommends resetting the mobile computer (see restart and hard reset).

Sources: Display Settings (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide (official documentation).

Short answer: The Zebra troubleshooting table distinguishes two cases: volume turned down or muted, or application not set to beep on a successful scan. Turn the volume back up; if the scan light turns green without sound, configure the beep in the application.

Likely cause

By default, a successful scan on the MC9300 turns the scan lights green and triggers a beep. If one of these is missing, the guide points to the volume or the application setting.

What to do

1. Turn the mobile computer's volume back up.
2. If the light turns green without a beep, set the application to beep on each successful scan.

Sources: Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide · Scanning with the Internal Imager (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) (official documentation).

Short answer: The password entered is incorrect. After five incorrect attempts, the MC9300 imposes a 30-second wait; after eight, a code is required before you can try again. If you have forgotten it, Zebra refers you to the system administrator.

Likely cause

The Android 11 guide describes the 30-second wait after five incorrect entries of the PIN, password or pattern; the troubleshooting table adds the lock after eight attempts.

What to do

1. Wait 30 seconds, swipe up on the lock screen and enter the code again.
2. If the code has been lost, contact the system administrator: the guide does not provide any other recourse.

Sources: Waking the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide for Android 11 (MN-004165-03EN Rev A, PDF) · Troubleshooting the Device (opens in a new window) – MC93XX Mobile Computer Product Reference Guide (official documentation).