Recently I have opened my Aurora R12 Alienware for maintenance. Unplugged some power supply cables just to blow out some dust. After that, there was no display at all, also no power supply for the keyboard or mouse, both USB.

I have performed the removal of the coin battery and also changed the pswd connector to the CMOS CLR for 10 to 20 seconds, as was suggested on different documentation.

None of the mentioned above worked. I can't see the Alienware logo, nor can enter the BIOS nor Windows.

Update = Resolved- After completing troubleshooting, a DELL-Cares agent setup a parts replacement.