2 Replies Latest reply on Jan 24, 2010 9:20 AM by mwkrasinski

    BIOS POST Sequence


      I have an old board (D850MV) that suddenly will not boot.  It powers up, but nothing happens (the monitor does not wake up).  There are no beeps.


      I have tried all of the normal troubleshooting steps and verified that all of the components are OK, except for the CPU (I don't have a spare).  The only thing that made a difference was completely removing the memory.  This resulted in a 3 beep code.


      My question is this - does the BIOS check the memory before the CPU (in which case my CPU is likely bad), or will a bad CPU prevent the memory check (in which case the CPU is likely good)?

        • 1. Re: BIOS POST Sequence


          The fact that you are getting three beeps without memory, means that the POST has bassed teh basic CPU motherboard check, so in theory they are fine. But if you have checked all other components...then it has to be the board or CPU, have you checked the monitor and cables? PSU? also do you have a graphics card, have you checked it?

          • 2. Re: BIOS POST Sequence

            The monitor is fine (works on all other systems).  The video card is fine (checked with multiple, known good cards).  Changing to a new, good PSU makes no difference.  All components have been verified, except for the memory and CPU (I don't have spares for either).


            I am just trying to discern if the motherboard, CPU, or memory is the culprit.