Two methods I was given by support (AMD):
Full Mainboard reset: To do this, you need to do the following:
a. Plug the laptop into AC power.
b. Remove the Input Cover.
c. Press the chassis open switch in the center of the mainboard 10 times. NOTE: You must press it slowly, so press for 2 seconds, release, and wait for the red blink on the mainboard LEDs, and then press again. Please use the flat tip of the screwdriver.
d. Press the power button to boot the system.
e. BIOS settings will be reset to defaults.
Power-draining the mainboard: To do this, kindly follow the steps below:
- Disconnect the main battery.
- Press and hold SW1 button for 30 seconds.
- After holding the SW1 button, let the mainboard reset (disconnected) for 15 minutes.
- Reconnect the battery and try to power it on again.