Hi, 

Try clearing the CMOS settings and doing a power drain. Refer to the Service Manual under the Clearing CMOS settings section for instructions on how to do this. After clearing the CMOS settings, do a power drain (disconnect all external devices and the power cord, press and hold the power button for 1 minute, connect everything again and turn on the system). Try accessing the Bios to check if it works, let us know how it goes.

well thats a journey I wouldn't want to repeat! 

did exactly as you asked 

then booted the pc and get an error " cmos battery fails!!

rtc is reset, bios setup default has been loaded , strike the f1 key to continue f2 to run the setup utility"

but nothing responded,

luckily i remembered the PC shipped with the DELL bare as bones keyboard,

plugged it in . restarted and entered bios successfully, 

seems my keyboard isnt liked by the PC, hmmmmmmmmmmmmmmmmm

well thank you as well, you got me going in the right direction :)

Cheers

DaZ

Hello,

Thank you for sharing this with the Alienware Community. I'm glad you were able to fix the issue.