Pax A920 power button failure analysis. Identifies causes of Android recovery mode. Provides safe troubleshooting steps for retail checkout terminals.
5V DC
Contact PAX technical support or your authorized PAX distributor.
0°C to 50°C (32°F to 122°F)
The power button triggers a voltage interrupt to the main processor. A faulty button may cause spurious signals interpreted as recovery mode commands. Low voltage or electrostatic discharge (ESD) events can corrupt the boot process. Capacitive touch screen malfunctioning may cause erratic system behaviour.
Device enters Android System Recovery mode. Power button may be unresponsive or require multiple attempts to activate. Unintended reboots observed.
Electrostatic discharge (ESD) can damage the device. Avoid touching electronic components directly. Ensure hands are dry when handling the device. Do not attempt to open or repair the device yourself, as this will void the warranty and may trigger anti-tamper mechanisms. Safe Handling: Unplug device before cleaning or inspection.
Regularly clean the device, including the power button area, with a dry, non-abrasive cloth.,Use a surge protector to protect against power fluctuations.,Implement ESD control measures, especially during dry winter months (e.g., anti-static mats).,Avoid exposing the device to extreme temperatures or humidity.,Ensure adequate ventilation to prevent overheating.
Try a 'long press' of the power button (10-15 seconds). This can sometimes force a hardware reset and bypass minor software glitches that trigger recovery mode. Use a small portable fan during use to cool the device in high temperatures.