MC3400/MC3450 Mobile Computer

Troubleshooting the Device

The following table provides typical problems that might arise and the solution for correcting the problem.

Problem	Cause	Solution
When pressing the power button the device does not turn on.	The battery is not charged.	Charge or replace the battery in the device.
	The battery is not installed properly.	Install the battery properly.
	System crash.	Perform a reset.
The battery did not charge.	Battery failed.	Replace battery. If the device still does not operate, perform a reset. See Resetting the Device.
	The device was removed from the cradle while the battery was charging.	Insert the device in the cradle and begin charging. The 7,000 mAh PowerPrecision+ extended battery charges from 0% to 90% in less than 5.2 hours at room temperature. The 5,200 mAh PowerPrecision+ high-capacity battery charges from 0% to 90% in less than 3.8 hours at room temperature.
	Extreme battery temperature.	The battery does not charge if the ambient charging temperature is below 0°C (32°F) or above 40°C (104°F).
Cannot see characters on display.	The device is not powered on.	Press the Power button.
During data communication with a host computer, no data transmitted, or transmitted data was incomplete.	The device is removed from the cradle or disconnected from the host computer during communication.	Replace the device in the cradle, or reattach the communication cable and re-transmit.
	Incorrect cable configuration.	See the system administrator.
The device does not emit sound.	The volume setting is low or turned off.	Click on the speaker icon to increase the volume.
The device turns itself off.	The device is inactive.	The display turns off after a period of inactivity. Set this period from 15 seconds to Never.
The device turns itself off.	The battery is depleted.	Recharge or replace the battery.
A message displays that the device's memory is full.	Too many applications are installed on the device.	Remove user-installed applications on the device to recover memory. Select Settings Apps . Select the unused program(s) and tap Uninstall .
The device does not decode with a reading barcode.	DataWedge is not enabled.	Ensure that DataWedge is enabled and configured properly.
	Unreadable barcode.	Ensure the symbol is not defaced.
	The distance between the exit window and the barcode is incorrect.	Place the device within the proper scanning range.
	The device is not programmed for the barcode type.	Program the device to accept the type of barcode being scanned.
	The device is not programmed to generate a beep.	If the device does not beep on a good decode, set the application to generate a beep on a good decode.
Device cannot find any Bluetooth devices nearby.	Too far from other Bluetooth devices.	Move closer to the other Bluetooth device(s), within a range of 10 meters (32.8 feet).
	The Bluetooth device(s) nearby are not turned on.	Turn on the Bluetooth device(s) to find.
	The Bluetooth device(s) are not in discoverable mode.	Set the Bluetooth device(s) to discoverable mode. If needed, refer to the device’s user documentation for help.
Cannot connect to WLAN (on channels 12-13 and all 5 GHz channels).	Access Point (AP) does not broadcast country code.	Disable 802.11d feature. Go to Settings Wi-Fi Additional settings Country Selection . A warning window pops up indicating you must select the country in which you are using the device. This enables all channels for the selected country even if the AP does not broadcast the country code.
When trying to open files or other applications, the application automatically closes.	The internal memory is full.	Connect the device to a host computer and delete files from Internal Memory using the host computer.