Datalogic Memor X3 troubleshooting guide: errors, faults and fixes

Short answer: On the Memor X3, the charging light is to the right of the display; according to the Datalogic manual, red flashing indicates a charging fault. Check the room temperature, the power supply and the condition of the battery, then restart charging.

Likely cause

The “LED Status” table associates the charging light flashing red with a charging fault (charge fault). The manual and the safety addendum set charging between 0 and 40 °C, with a Datalogic-approved power supply or a USB-IF compliant USB port.

Caution: Do not short-circuit the battery contacts with metal objects (coins, paper clips, pens), including when carrying a spare battery. Keep it away from fire, heat sources, direct sunlight, microwave ovens, tumble dryers and induction hobs; do not puncture, crush or immerse it.

What to do

1. Remove the device from the cradle or disconnect the cable.
2. Recharge in a room between 0 and 40 °C.
3. Use only a Datalogic-approved power supply; over USB, only a USB-IF compliant port.
4. Inspect the battery: do not use a damaged battery.
5. Restart charging and check that the right light changes to solid red.

Chapter 2.1 and the addendum state 0 to 40 °C; the technical specifications in the manual and the cradle guides use 0 to 36 °C. Staying within the narrower range avoids any ambiguity.

Sources: 4.4.1 LED Status (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · 2.1 Charging the Battery Pack (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · 5.1 Technical Data (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · Memor X3 Mobile Computer Safety & Regulatory Addendum (opens in a new window) – Safety & Regulatory Addendum (852000724 Rev. A) (official documentation).

Short answer: The right technique depends on the scan engine: laser, 2D imager or linear imager. On the linear model, the light bar must cross the barcode from end to end, at an angle of no more than 30° from the perpendicular; if the left light does not turn green, check that the symbology is enabled.

Likely cause

According to section 4.2, the scanning light lights red from pressing the trigger until decoding, then stays green for an adjustable time after a successful scan. Each engine has its own aiming method.

Caution: Laser version: “LASER LIGHT - DO NOT STARE INTO BEAM”, class 2 laser product, do not look into the beam. The imager illumination is a class 1M LED.

What to do

1. Laser version: point at the barcode within the reading range while pressing the SCAN key.
2. 2D imager version: point at the barcode and press SCAN or the pistol grip trigger.
3. Linear imager version: the light bar must cross the whole barcode; hold the device at no more than 30° from the perpendicular to the barcode.
4. Open the Decoding applet and check in Reader Parameters that the barcode's symbology is enabled (see barcode type rejected).
5. Clean the device with a slightly damp cloth, without alcohol, corrosive products or solvents.

The operating range stated is -10 to +50 °C for the laser and 2D imager models.

Sources: 4.2 Data Capture (opens in a new window) · 4.4.1 LED Status (opens in a new window) · 2.3 Cleaning the Mobile Computer (opens in a new window) · 5.1 Technical Data (opens in a new window) · Laser Safety (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: Symbologies are enabled in the Decoding applet, under Reader Parameters (for example Code 39 and its check digit control). Enable the rejected symbology, then save with File > Save so that the setting survives the next restart.

Likely cause

According to sections 4.5.1 and 4.5.2, Reader Parameters is used to enable or disable symbologies and their options; File > Save saves to non-volatile memory.

What to do

1. Tap the Decoding icon: a drop-down menu opens.
2. Open the configuration, under Reader Parameters.
3. Enable the symbology concerned and check its options, such as the check digit control.
4. Save with File > Save: the setting is written to non-volatile memory and is not lost at the next restart.

The Scan Parameters branch sets the beeper, the light and the laser timeout.

Sources: 4.5.1 Data Capture Configuration (opens in a new window) · 4.5.2 Configure (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The barcode is decoded but is not sent as keyboard input. Tap the Decoding icon: the last item in the drop-down menu, Wedge, enables keyboard emulation.

Likely cause

According to section 4.5.1, the last item in the Decoding icon menu (Wedge) enables keyboard emulation (Wedge Emulation).

What to do

1. Tap the Decoding icon.
2. In the drop-down menu, select Wedge to enable keyboard emulation.
3. Place the cursor in the application field and scan the barcode again.
4. If the setting disappears on restart, see forgotten settings.

Source: 4.5.1 Data Capture Configuration (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The Memor X3's 802.11 a/b/g/n Wi-Fi is configured in the Summit Client Utility (SCU). Create the network profile (Scan, Configure, Commit), select it, then check the connection in the Status tab.

Likely cause

According to the manual, the radio is on by default and is switched off in the Wireless Communications applet; the connection relies on an SCU profile.

Caution: Use only the supplied antenna or an approved antenna. People with a pacemaker must keep the device more than 25 cm away; switch it off in healthcare facilities, near airbags and in explosive atmospheres.

What to do

1. Open the SCU: Start > Programs > Summit > SCU, or double-tap Wi-Fi in the Control Panel.
2. Profile tab: enter the network or tap Scan and choose the ESSID.
3. Tap Configure to set up security, then Commit to save the profile.
4. Select the profile and check the connection in the Status tab.
5. If the radio has been switched off, switch it back on in the Wireless Communications applet.

After waking from sleep, reassociation with the access point can take up to 30 seconds.

Sources: 3.4 WLAN Connection (opens in a new window) · 4.5.7 Wireless Communications (opens in a new window) · 3.7 Wireless and Radio Frequencies Warnings (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: Bluetooth on the Memor X3 is off by default and its range is about 10 metres. Switch the radio on in Bluetooth Manager, bring the devices closer together, make them discoverable and start Discovery.

Likely cause

According to sections 3.5 and 4.6.2, the Bluetooth radio is supplied switched off, has a range of about 10 m and takes around ten seconds to reinitialise after waking from sleep.

What to do

1. Open Bluetooth Manager; if the radio is off, the device offers to enable it. You can also enable it in the Settings tab.
2. Make the other device discoverable and place it within 10 m.
3. Connections tab: choose a device type, or Discovery > Discover.
4. Choose the service and its options; if you tick Authentication, enter the PIN code of the remote device.
5. To be visible to another device, tap Find Me: the Memor X3 remains discoverable for 60 seconds.
6. After waking from sleep, wait around ten seconds for the radio to reinitialise.

If Bluetooth was on at shutdown, it switches back on automatically at the next start-up.

Sources: 3.5 WPAN Connections (opens in a new window) · 4.6.2 Bluetooth Manager Device Setup (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The Memor X3 connects to the PC with a standard micro-USB cable, or through the single cradle with a mini-USB cable. Synchronisation is handled by Windows Mobile Device Center on Windows Vista or 7, and by ActiveSync on Windows XP.

Likely cause

According to sections 3.1 and 4.6.1, the USB link follows the USB 2.0 standard and WMDC is only compatible with Windows Vista and Windows 7; it works over USB, RS-232 or Bluetooth.

What to do

1. Install WMDC (Vista, 7) or ActiveSync (XP) on the PC.
2. Connect the device with a micro-USB cable, or place it in the single cradle connected to the PC with a mini-USB cable.
3. In WMDC, accept the licence, choose Set up your device, the synchronisation types and a device name.
4. Serial connection: cable 94A051022 for the device alone, null modem cable 94A051020 for the single cradle. The cradle's power supply is then only needed for charging.

Sources: 3.1 USB Connection (opens in a new window) · 3.3 RS232 Connection (opens in a new window) · 4.6.1 Windows Mobile Device Center (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: USB keyboards and flash drives are connected with cable 94A051024, at USB 1.1, and must not draw more than 100 mA. A peripheral that draws more will not be powered correctly.

Likely cause

Section 3.2 of the manual: the maximum current draw must stay below 100 mA.

What to do

1. Use cable 94A051024, designed for peripherals.
2. Check that the peripheral draws less than 100 mA.
3. Try another USB 1.1 compatible peripheral.

Source: 3.2 Connection to USB Peripherals (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The Memor X3's FTP server is enabled with a registry file (.reg), followed by a warm boot. It can then be reached over the Wi-Fi network, at the device's IP address, from Windows Explorer or an FTP client.

Likely cause

Section 4.6.3 describes how to enable the FTP server and specifies that it is accessible through the WLAN interface.

Procedure

1. Create a .reg file that enables the FTP server and allows anonymous connection, as described in the manual.
2. Copy it to the device with ActiveSync.
3. Run the .reg file on the device.
4. Perform a warm boot.
5. On the PC, enter the device's IP address in the Explorer address bar or in an FTP client.

The server enabled in this way accepts anonymous connections, according to the manual.

Source: 4.6.3 FTP Server Setup (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: On the single Ethernet cradle, the left light off means that no link has been established. Check that the selector is set to “Ethernet”, that the UTP CAT 5E cable is connected and that the cradle is powered: power is required for Ethernet communication.

Likely cause

According to the cradle guide, the left light green indicates the link (solid) and activity (flashing); when it is off, there is no link. The right yellow light off indicates a 10 Mb connection, the only speed supported by this model.

Caution: Never connect this cradle to a PoE (Power over Ethernet) network: Datalogic warns of a risk of irreversible damage. Always make the connections with the power off and do not dismantle the cradle, or you will void the warranty.

What to do

1. With the cradle switched off, connect the cradle's Ethernet port to a hub or to the host port, preferably with a UTP CAT 5E cable.
2. Connect the recommended power supply to the cradle's socket.
3. Set the selector to the Ethernet position. Do not place the device in the cradle while switching from USB mode to Ethernet mode.
4. Configure the cradle with the CPDockCE application (Windows CE) or Dock Manager (Windows XP).
5. Check that the left light turns green.

Source: Memor X3 Single Ethernet Dock (opens in a new window) – Memor X3 Single Ethernet Dock (822001522 Rev. A) (official documentation).

Short answer: Datalogic asks you not to use the Memor X3 before at least 4 hours of charging. Charge it with the power supply, in the single cradle, or over USB with the device switched off, which is slower; the right light stays red during charging and turns green when it is complete.

Likely cause

Section 2.1 and the safety addendum set the minimum charge at 4 hours before use and describe the charging methods.

Caution: Charge between 0 and 40 °C, only with a Datalogic-approved power supply or a USB-IF compliant USB port. Slight warming during charging is normal.

Procedure

1. Charge the device with its power supply or in the single cradle.
2. Over USB, connect the device directly to the computer; charging only takes place with the device switched off and takes longer.
3. A spare battery is charged in the charging slot of the single cradle or in the multi-battery charger.
4. Wait at least 4 hours before first use.
5. Check the right light: solid red while charging, solid green when charging is complete.

According to the single Ethernet cradle guide, a spare battery charges in at most 2 h (1100 mAh), 3 h (1430 mAh), 4 h (2000 mAh) or 5.5 h (2300 mAh); with the device placed in the cradle at the same time, allow 3, 4, 6 or 7.5 h.

Sources: 2.1 Charging the Battery Pack (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · 4.4.1 LED Status (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · Memor X3 Mobile Computer Safety & Regulatory Addendum (opens in a new window) – Safety & Regulatory Addendum (852000724 Rev. A) · Memor X3 Single Ethernet Dock (opens in a new window) – Memor X3 Single Ethernet Dock (822001522 Rev. A) (official documentation).

Short answer: Switch off the device, press the latch release and remove the cover. Insert the battery from the top, contacts side first, then the bottom, refit the cover and close the latch; Datalogic advises replacing it once a year.

Likely cause

Section 2.2 of the manual and the safety addendum describe the replacement and its precautions.

Caution: Risk of explosion if the battery is replaced by an incorrect type. Do not short-circuit its contacts, do not expose it to liquids and do not use a damaged battery. Dispose of used batteries in accordance with local regulations, separately from the device.

Procedure

1. Switch off the Memor X3: do not replace the battery with the device switched on.
2. Press the latch release and remove the cover.
3. Remove the old battery.
4. Insert the new battery from the top (contacts side), then lower the bottom.
5. Refit the cover and close the latch.

When to call a technician: the manual restricts battery installation and charging to authorised personnel, following its instructions.

According to the technical specifications, the Memor X3 uses a 1-cell 1420 mAh Li-Ion battery or a 2-cell 2300 mAh battery; a small 30 mAh Ni-MH internal backup battery completes the set.

Sources: 2.2 Replacing the Battery Pack (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · 5.1 Technical Data (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · Memor X3 Mobile Computer Safety & Regulatory Addendum (opens in a new window) – Safety & Regulatory Addendum (852000724 Rev. A) (official documentation).

Short answer: Datalogic advises storing the device and spare batteries between 20 and 30 °C, without leaving them fully charged or almost empty for long periods. Recharge them every two to three months to keep them at a medium level.

Likely cause

Section 2.1 and the safety addendum give these instructions to preserve battery life; the addendum also recommends replacing them once a year.

Caution: Do not store batteries near a heat source or in direct sunlight.

What to do

1. Store the device and batteries between 20 and 30 °C.
2. Avoid leaving a battery fully charged or almost empty for long periods.
3. Recharge stored batteries every two to three months.
4. Carry spare batteries away from metal objects (coins, paper clips, pens).
5. Replace the batteries every year for better performance.

Sources: 2.1 Charging the Battery Pack (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) · Memor X3 Mobile Computer Safety & Regulatory Addendum (opens in a new window) – Safety & Regulatory Addendum (852000724 Rev. A) (official documentation).

Short answer: According to the single Ethernet cradle guide, this light can go off to indicate a temporary suspension of charging. It is solid red while the spare battery is charging and solid green when charging is complete.

Likely cause

The “Memor X3 Single Ethernet Dock” guide describes the three states of the charging light: solid red (charging), solid green (charging complete), off (temporary suspension). The battery must be charged between 0 and 36 °C.

Caution: Do not dismantle the cradle: any tampering voids the warranty.

What to do

1. Leave the battery in place: charging resumes after the suspension.
2. Check that the room is between 0 and 36 °C.
3. Check that the cradle's green power light is on: power is required for charging in all modes.
4. Use the recommended power supply (5 V, 2.5 A, part number 94ACC1324).

The rear slot of the cradle accepts 1100, 1430, 2000 and 2300 mAh batteries.

Source: Memor X3 Single Ethernet Dock (opens in a new window) – Memor X3 Single Ethernet Dock (822001522 Rev. A) (official documentation).

Short answer: The four-slot cradle has only one light, solid green when it is powered. If it is off, check the approved mains adapter (12 V, 5 A); if it is on, check that each device is pushed fully in and that the room is between 0 and 36 °C.

Likely cause

The “Memor X3 Four Slot Dock Charger” guide describes the power light, how to insert the devices and the 0 to 36 °C charging range.

Caution: Do not dismantle the cradle: it contains no user-serviceable parts and any tampering voids the warranty.

What to do

1. Check the power light: solid green when the cradle is powered.
2. Use only a Datalogic-approved mains adapter, 12 V DC, 5 A maximum.
3. Insert each device from the top of the slot and push it down.
4. To remove a device, pull it upwards while holding the cradle.
5. Check that the room is between 0 and 36 °C for charging (cradle usable from 0 to 50 °C).

Source: Memor X3 Four Slot Dock Charger (opens in a new window) – Memor X3 Four Slot Dock Charger (822001541 Rev. A) (official documentation).

Short answer: Perform a clean boot: start a cold boot, release all keys as soon as the screen goes black, then, within one second, hold Esc and 0 until the confirmation request appears; type 1 to start, 0 to cancel. All applications and data in flash memory are lost.

Likely cause

According to section 4.3.1, the clean boot restores the factory configuration, including the registry and the file system.

Caution: The clean boot erases all applications and data stored in persistent flash memory.

Procedure

1. Back up the applications and data you want to keep.
2. Start a cold boot (see Windows CE frozen).
3. Quickly release all keys when the screen goes black.
4. Within the next second, hold Esc and 0 until the clean boot confirmation appears.
5. Type 1 to start the clean boot, or 0 to cancel it.
6. At the next start-up, the system asks you to calibrate the touch screen.

Source: 4.3.1 Resetting the Memor X3 (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: On the Memor X3, a setting is only kept if it is written to non-volatile memory. Save the scanning settings with File > Save in the Decoding applet and the Windows settings with Save Registry in the Registry applet.

Likely cause

According to sections 4.5.2 and 4.5.5, File > Save prevents scanning settings from being lost at the next restart and Save Registry saves the Windows configuration to non-volatile memory.

What to do

1. Decoding applet: after making changes, choose File > Save.
2. Control Panel, Registry applet: tap Save Registry.
3. After restoring the factory configuration in the Registry applet, perform a warm boot, as the manual requires.

For files and applications, see missing applications.

Sources: 4.5.2 Configure (opens in a new window) · 4.5.5 Registry (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: Only files placed in non-volatile memory survive: the Backup folder and whatever has been saved with the Files Admin applet. Enable Safe Setup before installing a program and use Save Session to save the Windows folder.

Likely cause

According to sections 4.5.6 and 4.7, Save Session saves the files in the \Windows folder to non-volatile memory, Safe Setup saves installations in the Backup folder, and the contents of the Backup folder, in flash memory, persist across restarts. A cold boot erases files that are not in flash memory.

Caution: A clean boot also erases the flash memory: back up elsewhere anything that must survive a return to the factory configuration.

What to do

1. Before installing a program, enable Safe Setup in the Files Admin applet: the installation is saved in the Backup folder.
2. After making a change, tap Save Session to save the \Windows folder to non-volatile memory.
3. Keep your working files in the Backup folder, which stays in place on restart.

Sources: 4.5.6 Files Admin (opens in a new window) · 4.7 Backup Directory File Management (opens in a new window) · 4.3.1 Resetting the Memor X3 (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The Memor X3 constantly monitors its battery level and refuses to start if the battery is not sufficiently charged. Insert a charged battery, place the device in a powered cradle or connect it to a mains charger.

Likely cause

The safety addendum explains this behaviour, which is intended to maximise battery life. Section 4.1 points out that the device is switched on with the ON/OFF key once the battery is installed.

What to do

1. Replace the battery with a charged one, or place the device in a powered cradle, or connect it to a mains charger.
2. Check that the battery cover is in place and the latch is closed.
3. Press ON/OFF.
4. On first start-up, the device asks you to calibrate the screen (see touch screen).

According to the addendum, the battery is disconnected at the factory to prevent excessive discharge and is only partially charged on delivery (see first charge).

Sources: Memor X3 Mobile Computer Safety & Regulatory Addendum (opens in a new window) – Safety & Regulatory Addendum (852000724 Rev. A) · 4.1 Startup (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The Memor X3 enters low-power mode after an inactivity timeout set in the POWER applet. It wakes up with the ON/OFF key, with the SCAN key, or when it is placed in or removed from its cradle.

Likely cause

Section 4.1 of the manual: timeout programmable in the POWER applet and three ways to wake the device.

What to do

1. Wake the device with ON/OFF or SCAN, or by placing it in or removing it from the cradle.
2. To lengthen the timeout, open the POWER applet in the Control Panel.
3. After waking, wait up to 30 seconds for the Wi-Fi to reconnect and around ten seconds for Bluetooth to resume.

Sources: 4.1 Startup (opens in a new window) · 3.4 WLAN Connection (opens in a new window) · 3.5 WPAN Connections (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: Start with a warm boot: it closes applications and clears the working memory while keeping files and the registry. If Windows CE remains frozen, Datalogic provides a cold boot, which also erases files that are not in flash memory.

Likely cause

According to section 4.3.1, the warm boot keeps the file system and the registry; the cold boot is needed when Windows CE is frozen and the warm boot does not work. It clears the memory, erases files that are not in flash memory and restores the registry from flash memory if it had been saved there.

What to do

1. If the device still responds, save the registry (Save Registry) and the files (Save Session) before restarting.
2. Perform a warm boot with the simultaneous key combination given in the manual.
3. If Windows CE remains frozen, perform a cold boot with its own key combination.
4. After the cold boot, reinstall if necessary the files that were not in flash memory (see missing applications).

The key combinations for the warm boot and cold boot only appear in the manual as symbols and are not reproduced here.

Sources: 4.3.1 Resetting the Memor X3 (opens in a new window) · 4.5.5 Registry (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: Datalogic directs fleets towards Wavelink Avalanche and updates of a few devices towards the Datalogic Firmware Utility (DFU) on a PC. DFU works over an ActiveSync or WMDC connection that is already established and warm boots the device once the update is done.

Likely cause

Section 4.8 of the Memor X3 manual.

Procedure

1. Download the firmware image from the Datalogic website.
2. Remove any earlier version of DFU from the PC, then install DFU.
3. Establish the ActiveSync or WMDC connection with the device.
4. On the PC, open Start > Programs > Datalogic > DFU, select WMDC/ActiveSync, choose the image and click Update.
5. DFU checks the compatibility of the image, updates the firmware and then performs a warm boot.
6. After the update, the device asks you to calibrate the touch screen.

Sources: 4.8 Datalogic Firmware Utility (opens in a new window) · 4.5.8 Stylus Calibration (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: Recalibrate the screen: Control Panel, Stylus applet, Calibration tab, then Recalibrate. Tap the centre of each target, then confirm with Enter or by touching the screen; Esc keeps the previous setting.

Likely cause

According to section 4.5.8, the calibration is saved in the registry; it is also requested at first start-up, after a registry restore followed by a warm boot, after a clean boot and after a firmware update.

Procedure

1. Control Panel: double-tap Stylus.
2. If necessary, adjust the double-tap sensitivity (Double-Tap).
3. Calibration tab, tap Recalibrate.
4. Tap briefly with the stylus in the centre of each target; Esc cancels.
5. Confirm with Enter or by touching the screen; Esc keeps the previous setting.

Source: 4.5.8 Stylus Calibration (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The Memor X3's 25-key numeric keypad switches between numeric and alphanumeric input with the ALPHA key. The centre light shows the mode: yellow or blue when a colour function is active, pink when CapsLock is enabled.

Likely cause

According to section 4.3, the ALPHA key toggles between numeric and alphanumeric input; the yellow and blue modifier keys (FUNC) apply to the next key pressed. With ALPHA and CapsLock active, the orange characters are entered.

What to do

1. Press ALPHA to return to numeric input.
2. Centre light pink: CapsLock is enabled.
3. Yellow or blue light: the yellow or blue modifier key will apply to the next key pressed.
4. In the taskbar, an icon indicates that the blue FUNC key has been pressed and will affect the next key.

With the blue key, two keys switch the screen backlight and the keypad backlight on or off.

Sources: 4.3 Description of the Keyboards (opens in a new window) · 4.4.1 LED Status (opens in a new window) · 4.4.2 Taskbar (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).

Short answer: The keypad has probably been locked: the taskbar then shows a dedicated icon. Locking and unlocking are done with the blue key (FUNC) followed by the keypad lock key.

Likely cause

According to sections 4.3 and 4.4.2, the blue modifier key is used to lock and unlock the keypad, and the taskbar indicates a locked keypad.

What to do

1. Look at the taskbar: the locked keypad icon confirms the lock.
2. Press the blue key (FUNC), then the key with the lock function printed in blue.
3. If the whole device is frozen, see Windows CE frozen.

Sources: 4.3 Description of the Keyboards (opens in a new window) · 4.4.2 Taskbar (opens in a new window) – Memor X3 Mobile Computer User's Manual (822001591) (official documentation).