Pax A920 Stuck in Android System Recovery After Failed... | terminalfaults.org

Technical Background:

The Android System Recovery mode is a failsafe environment separate from the main operating system. This mode is typically activated due to a corrupted system image, interrupted update process, or critical software error. The A920's bootloader likely detected the error and initiated recovery. Interrupted transactions can corrupt data being written to flash memory, leading to this state. Voltage fluctuations during transactions can also trigger the bootloader. ESD events, especially in dry environments, can cause temporary memory corruption.

Symptoms:

The Pax A920 terminal is displaying the 'Android System Recovery' screen and is unresponsive to normal operation after a failed Moneris transaction.

Possible Causes:

Interrupted firmware update during transaction processing.
Corrupted data partition due to failed transaction.
Voltage fluctuation during critical write operation.
Software conflict within the Android operating system.
Electrostatic discharge (ESD) causing memory corruption.
Faulty power adapter or insufficient power supply.

Solution:

1

Perform a safe shutdown: Disconnect the power adapter from the Pax A920.
2

Reconnect power adapter: Wait 30 seconds, then plug the power adapter back into the A920.
3

Attempt a normal reboot: Press and hold the power button to initiate a normal startup sequence.
4

If normal boot fails, attempt to clear cache partition: While the device is booting (consult Pax documentation for the correct key combination - typically Volume Up + Power), enter recovery mode. Use the volume buttons to navigate to 'wipe cache partition' and select it with the power button. This will NOT erase user data.
5

If clearing the cache fails, perform a factory reset (DATA LOSS WARNING): As a last resort from the recovery menu, navigate to 'wipe data/factory reset' and select it with the power button. THIS WILL ERASE ALL DATA ON THE DEVICE. Confirm the reset if prompted. Document any settings BEFORE proceeding.
6

If the device continues to boot into recovery mode after factory reset, the firmware is likely corrupted and requires reflashing by authorized personnel. Contact Pax support or a qualified technician for firmware reflashing assistance. Do NOT attempt to reflash the firmware yourself.
7

Verify power supply: Ensure the power adapter is the correct voltage and amperage for the Pax A920.

Safety Warning:

Safe Handling: Disconnect the power adapter from the device before performing any troubleshooting steps. Avoid working on the device near liquids. Ensure hands are dry when handling the device or power adapter. Do NOT open the device casing; this will void the warranty and trigger anti-tamper mechanisms.

Prevention:

Ensure a stable power supply to prevent voltage fluctuations. Use a dedicated power outlet if possible.,Implement a regular cleaning schedule for the terminal, especially the touchscreen, using a soft, lint-free cloth and isopropyl alcohol wipes.,Train staff on proper handling procedures to avoid dropping or mishandling the device.,Implement measures to reduce electrostatic discharge (ESD), especially during dry winter months. Use anti-static mats and sprays.,Ensure cables are properly connected and free from strain or damage. Replace damaged cables immediately.,Avoid interrupting transactions in progress.

Expert Tip:

Sometimes, rapidly pressing the power button multiple times during the boot sequence can force the device to exit recovery mode. This is not a guaranteed solution but worth trying before more drastic measures. Also, a slightly loose power connection may cause intermittent issues. Wiggling the power connector at the device while pressing the power button can sometimes bypass a boot issue.

Frequently Asked Questions

•What is the key combination to enter recovery mode on the Pax A920?

Consult the Pax A920 documentation or contact Pax support for the correct key combination. It typically involves holding a volume button while pressing the power button.

•What data will be lost during a factory reset?

A factory reset will erase all user data, including installed applications, user accounts, and settings.

•How do I contact Pax support for firmware reflashing?

Visit the Pax Technology website and locate the support section. You will find contact information and resources for obtaining firmware reflashing assistance from authorized personnel.

Pax A920 Stuck in Android System Recovery After Failed Transaction

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the key combination to enter recovery mode on the Pax A920?

•What data will be lost during a factory reset?

•How do I contact Pax support for firmware reflashing?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: