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    t400 wont boot w/o reseting little battery behind palm rest

    Discussion in 'Lenovo' started by acometiscoming, Mar 9, 2011.

  1. acometiscoming

    acometiscoming Newbie

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    First, my t400 would only boot with power cord unplugged. Then it stopped booting altogether. I read to press the power button 10 times and hold it on the tenth time and to unscrew the palm rest to unplug the little battery for 30 seconds. That is the only way I can get it to boot now. I picked up a new regular battery today thinking it might be related but that hasn't solved it. Any ideas?
     
    acometiscoming, Mar 9, 2011
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  2. nni123

    nni123 Notebook Consultant

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    I had same problem in T41. After doing this 10 time thing it won't power on. IBM authorize repair center said mother board issue (capacitor related maybe charge/discharge).

    If you have warranty good otherwise replacing mother board is pretty expensive (around $500 to $600). sounds like time to backup stuff from your system.
     
    nni123, Mar 9, 2011
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  3. acometiscoming

    acometiscoming Newbie

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    Nooooo! Not what I wanted to hear but thanks.
     
    acometiscoming, Mar 9, 2011
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  4. acometiscoming

    acometiscoming Newbie

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    I looked at it closer and to get it to start i don't press the power button at all. I unplug the power cord and after unplugging the CMOS battery for awhile i just plug the power cord back in and it starts up. The first thing i see as it starts up is an error message about a bad CMOS checksum and then i have to change the date/time in the BIOS or it yells at me to do it. After all that it boots into windows 7. Once it is in windows no matter what i do to change the settings of what the power button does it still doesn't do anything. I can restart it fine but once i shut it down it the CMOS battery needs to be reset to get it going again.
     
    acometiscoming, Mar 10, 2011
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