How to Recover the Operating System of Android POS system

Sometimes, the Android POS system fails to enter into the operating system and can’t turn on USB debugging because of freezes. It can be solved by upgrading the firmware.
We recommend the person who has certain electronic product maintenance experience to use this method to upgrade firmware because the POS machine will be disassembled during operation, non-professional operations may cause damage to the POS machine.

Need to make the following preparations:
1. A computer with Windows operating system;
2. Download DriverAssitant (click here to download), and install it on the computer;

3. Download AndroidTool (click here to download) and firmware, put them where you can find on the computer;
4. Connect the computer USB port to the Android POS machine OTG port with a USB OTG cable;

5. Disassemble the POS shell to find the UBOOT button (PS: To avoid any damage, be careful not to pull the connection cable between the screen and the motherboard when disassembling the shell)

Remark:
1. If using a desktop computer, please connect its rear USB port. Using the extended USB port may cause the upgrade to fail.
2. The Android POS machine will come with a USB OTG cable, please use it to connect the POS machine and the computer. If you have a similar cable, please make sure that its length does not exceed 1 meter.

Specific steps:

1.  Run AndroidTool on the computer, press and hold the UBOOT button on the motherboard and Turn on the Android POS machine, if it prompts “Found One MASKROM Device”, it means the connection is successful.

2. Click Upgrade Firmware and click Firmware, select the upgrade firmware we provide to you on the computer.

3. Click Upgrade, after 2 to 3 minutes, the firmware upgrade is successful and the Android POS machine restarts.