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    N81vp battery issues

    Discussion in 'Asus' started by Whoosh, Mar 5, 2010.

  1. Whoosh

    Whoosh Notebook Enthusiast

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    Hey everyone,

    I was hoping someone could help me out. My brother has an Asus N81Vp. His battery died, I have an F8sv and offered my spare battery. The battery says "Replace: 90-NF51B1000, A32-A8, A8, F8, Z99 Series", but I think I bought it before the release of the N81. The voltage, capacity and form factor of the batteries were the same so we tried it, which I realize was probably a stupid idea. He replaced it while the computer was on and plugged in, and it worked fine for a few days. It charged and ran off the battery just fine. However, once the computer was restarted it would no longer boot.

    The laptop gives a "Reboot and Select proper boot device". I've tried getting it to boot off a Windows disc with no luck. If I try the "BBS POPUP" option when booting it occasionally gives something along the lines of "CMOS Bad Checksum". Rarely, it will boot up with no problems. If I remove the battery, it boots fine.

    I know very little about batteries, am I wrong to try to use the F8 battery? Or is this an issue with the computer itself?

    Any help is appreciated! Thank you!
     
    Whoosh, Mar 5, 2010
    #1
  2. evensen007

    evensen007 Notebook Deity

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    Do you mean you replaced the actual laptop battery, or the cmos battery? The cmos battery is a separate "watch type" battery that is directly on the motherboard of the laptop. If that battery goes bad, it is very common to get the messages and issues you are having. Sometimes it even ends up being a bad motherboard. If you can get to the cmos battery in the laptop (good luck) you can replace it and hopefully get going.
     
    evensen007, Mar 5, 2010
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  3. Whoosh

    Whoosh Notebook Enthusiast

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    I replaced the actual laptop battery, I wouldn't know where to begin with the CMOS battery. The CMOS error only came up a few times when I tried the BBS POPUP boot option, though the last few times I've tried it has been ok.

    It'll boot up fine with the battery removed, and will run on battery power once you put it back in. It goes in and out of sleep fine. I'm wondering if the issues booting with the battery are a motherboard issue, or an issue from using the F8 battery in the N81.
     
    Whoosh, Mar 5, 2010
    #3
  4. E.B.E.

    E.B.E. NBR Procrastinator

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    If it boots fine without the battery but doesn't boot with it, then it is indeed the battery at fault. Probably incompatibility between the BIOS and battery firmware. Although I didn't know that the effects of such an incompatibility could be so severe.

    You could consider buying a new battery, e.g., from the ASUS eStore. Isn't the battery that went bad still under warranty, btw?
     
    E.B.E., Mar 6, 2010
    #4