Error 251 system CMOS checksum bad, 280 previous boot incomplete

By patrick713
Jan 29, 2010
  1. When i try to start up my laptop, it repeatedly fails to boot anything. It will start the CD drive, then just sit and do nothing. After i manually shut it back off and on several times, it will then finally try to start the Harddrive, then immediately reboot. This cycle goes on several times, then it will finally boot, giving me these messages:
    Error 251- System CMOS Checksum bad
    Warning 280- Previous Boot incomplete
    then the options f1 resume and f2 setup.
    If i do f2 and reset the default BIOS, it just keeps doing the same thing.
    If i do f1, it brings up a screen the includes the warning PXE-E61 Media test failure. This screen goes away after a couple seconds and then windows starts, so i cant copy down the whole screen.
    Once windows starts, everything runs perfecly. Its just an issue of startup.

    The laptop is a gateway m-1625. About a month ago, the hardrive failed. I replaced it, and at the same time installed windows 7. Its been running great since, except for this problem appearing about a week ago. I have replaced the CMOS battery, no luck. Before replacing it, i tried running it without any CMOS battery, and there was no change in behavior. It acts the same whether there is a battery in it or not.

    Any help would be greatly appreciated.
  2. raybay

    raybay TS Evangelist Posts: 7,241   +9

    The m1625 has a history with bad system boards. Is it out of warranty?
  3. patrick713

    patrick713 TS Rookie Topic Starter Posts: 56

    yep, its definitely out of warranty. is there any way of knowing for sure if thats it? Wouldnt the board prevent it from working perfectly once it starts?
  4. patrick713

    patrick713 TS Rookie Topic Starter Posts: 56

    the other thing that weird to me is that its kept the time perfectly- even without a cmos battery. wouldnt that make absolutely no sense, still keeping the time with no battery?
  5. patrick713

    patrick713 TS Rookie Topic Starter Posts: 56

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