Hewlett-Packard 340LX soft reset

Remove the cover of the backup battery located on the bottom of 340lx and press the RED RESET button for 5 sec. The palmtop will reboot. All unsaved data will be lost!

HP 340LX hard reset

Hewlett-Packard 340LX hard reset

Removing the main battery is one of the steps in resetting all information on a device. Take out the main batteries for at least 3 minutes, then insert them and turn on your HP 340LX device.

Removing HP Palmtop 340LX main AA batteries


The two AA main batteries are stored under the battery plate on the bottom of the device, below the hinge for the cover. Slide the cover plate off and remove the two AA batteries. Reverse the process to reinstall the battery.

Removing HP Palmtop 340LX back up battery

The backup battery is found under the small square door on the bottom of the device. Open the door and use the stylus to remove the old battery. Reverse the process to reinstall the battery.

HP 340LX hard reset
HP 340lx Backup battery

The HP 340LX system uses one Li CR2032 battery for backup purposes. This backup battery will be used to maintain the system when the main batteries are removed from the system or when the main batteries are weak. The typical capacity of the backup battery is 180 mAh. The backup battery comes into operation when there is no ACIN signal and the VLB signal is active low. The Very Low Battery (VLB) signal is set to be low when the main battery voltage drops below 1.4 V. This signal is reset when the main batteries' voltages rise above 1.8 V.

If the backup battery is low, the device may function abnormally. The abnormalities may be related to the display, calibration, settings, sound, or other features. For example, the image on the screen will blink on and off or mix colors on the screen and/or the stylus may frequently need to be calibrated. Often the abnormality will occur with more frequency as the battery loses more power. The backup battery should be replaced AT LEAST every 6 months: sooner if the device is operated often with a low main battery.




General advice: Before you buy a new cell phone or new tablet, please try the following procedure to repair your device in a software way. First charge your battery, backup your important data if possible and in most cases take out SIM and SD card before doing factory reset. It is impossible to recover your data after doing a hard reset, so online backup is always important. For all of your data, a backup should be done on an external device, hard drive, raid system or media. With or without insurance, if your cell phone lost, damaged or stolen at least your invaluable data is backed up in a safe place. If you are about to sell your phone and you want to wipe your personal data, or if your phone affected with virus you have to do a hard reset. In some cases, you can delete the forgotten password or lock pattern from your device as well. All information is for devices with stock based ROMs. If you are using rooted device, always back up your EFS folder first, containing your IMEI info, etc.! Please also note, that a hard reset operation will not unlock your mobile phone's SIM lock or network lock, but it will remove the unlock pattern, remove the user password or PIN password (NOT the SIM card's 4 digit PIN code). Also note that the firmware version will not be affected in any way, it will not be downgraded, it will remain the same you are using and if you have rooted your device, root privileges remain also unaffected.