HP Dx2000 not booting

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  • Davi.p
    Hobbist Tech
    • Sep 2009
    • 4308
    • Italy - Milan
    #1

    HP Dx2000 not booting

    HI, i have this desktop pc that i got broken for free, i don't wanna to buy a new hardware, the mainboard is not booting, it makes the POST with no errors, it recognizes and test well various DIMMs , usb storage, hds, but it always arrive to the "CMOS setting wrong" message "Press F1 to enter setup" "Press F2 to load default values", i press every key but it remains stuck, also CTRl-ALT-DEL does nothing, keyboard is good, when i press F10 for network booting it does something different, or F9 for Boot menu.. i have toggled the cmos battery for more than 1 day, nothing different, i have tested with oscilloscope the dc-dc converters, no ripple, service manual tells that it has a self test for firmware/bios integrity that propose for a bios rewriting if is bad, but it doesn't, it remains stuck there, what type of problem could be? More a flash bios problem or hardware? i think the first.. but i'm unable to reflash.. On board there is a jumper that says:
    "1-2 Normal, 2-3 Safe, OPEN Recovery" i have tryed all the three with no differencies, in Safe it doesn't powerup, What are theese setting for?
    Last edited by Davi.p; 02-07-2014, 05:44 AM.
    Tags: None
    • Davi.p
      Hobbist Tech
      • Sep 2009
      • 4308
      • Italy - Milan
      #2
      Re: HP Dx2000 not booting

      have you ever tried to program a flash of a mainb. with another mainboard? The eprom contains POST code, BIOS and maybe something other, i think the bios comes copied to ram at boot by default so the cpu access the bios to ram (faster), this is why i have booted a mobo many years ago and after detaching the bios chip the mobo still functioned, but i had no success in putting a bios chip from other mobo and program it, don't remember what happened.

        Comment

        • cheapie
          null
          • Jul 2010
          • 849
          • USA
          #3
          Re: HP Dx2000 not booting

          Did you actually change the CMOS battery, or just remove and replace it?

            Comment

            • Davi.p
              Hobbist Tech
              • Sep 2009
              • 4308
              • Italy - Milan
              #4
              Re: HP Dx2000 not booting

              i have used a new battery but was a low quality, but i've also booted with a good 3v Lithium batt. with different format adapted, no changhes.

                Comment

                • Elysarian
                  Badcaps Veteran
                  • Mar 2013
                  • 200
                  • United Kingdom
                  #5
                  Re: HP Dx2000 not booting

                  Probably a silly question here...

                  Are you using a PS2 or USB keyboard here?

                  If the latter you may be having issues if legacy support isn't on by default in the BIOS.

                  If you have access to a PS2 keyboard (the sort with the round mini-DIN plug) you may have more success with it accepting the keystrokes.

                    Comment

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