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#11
I see you mentioned switching processors. That can cause problems.
Try doing a ClearCMOS procedure. (CLRTC is the same thing) It should be in you Dell manual. But for many motherboards it involves moving a jumper:
- Note all your current BIOS settings
- Shut down the computer > remove the power cord.
- Remove the 3v battery.
- Move the CLRTC jumper from pins 1-2 to 2-3.
- Touch a metal part of the case and Press and Hold the reset button for approx. 30 seconds to discharge all power from the board.
- Put the CLRTC jumper back on pins 1-2.
- Replace the 3v battery > replace the power cord > boot.
- Immediately go back into BIOS and reset all your preferred settings. If the CLRTC worked you will need to reset the date and time.