A70 Pro

Error Code

Cause Analysis

Troubleshooting / Solution

Firmware Error /

Topping other firmware /

Unknown file

Incorrect firmware version

Power off and reboot A70 Pro then re-upgrade the correct version of firmware.

No firmware

No firmware

Power off and reboot A70 Pro then re-upgrade the correct version of firmware. DO not disconnect from the computer in the middle of upgrade.

Update failed

Firmware upgrade failed

Power off and reboot A70 Pro then re-upgrade the correct version of firmware.

PN Voltage ERR/

P Voltage ERR

Abnormal positive/negative voltage

Power off and reboot A70 Pro after disconnecting all inputs and outputs.

HP DC abnormal

Abnormal headphone amplifier DC

1. Try to turn down the volume level, and reboot A70 Pro after it cools down (in 1 minute).

2. Switch to other songs.

3. Disconnect all the inputs and outputs, and reboot A70 Pro after it cools down. If that still not works, unit is considered defective.