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| IBM thinkpad 2647 CMOS battery failure ?? What kind of error messages result from a failed CMOS battery on a laptop? I'm looing at a dead ThinkPad 2647 laptop. When I power it up I get PCI errors and no I/O devices seem to be found. When googling for the hardware manual to find out how to remove the disk to recover data I'm reminded of the CMOS battery. It's been many years since I saw a dead battery make a mobo lose it's mind and I wonder if it's worth replacing the battery (It's an FRU) before I declare the machine dead. Comments ? -- a d y k e s @ p a n i x . c o m Harrison for Congress in NY 13CD www.harrison06.com Don't blame me. I voted for Gore. A Proud signature since 2001 |
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| Re: IBM thinkpad 2647 CMOS battery failure ?? "Al Dykes" <adykes@panix.com> wrote in message news:egtndt$39q$1@panix5.panix.com > What kind of error messages result from a failed CMOS battery on a > laptop? > > I'm looing at a dead ThinkPad 2647 laptop. When I power it up I get > PCI errors and no I/O devices seem to be found. > > When googling for the hardware manual to find out how to remove the > disk to recover data I'm reminded of the CMOS battery. It's been many > years since I saw a dead battery make a mobo lose it's mind and I > wonder if it's worth replacing the battery (It's an FRU) before I > declare the machine dead. > > Comments ? Well I believe it depends on the BIOS manufacture and the version number what it will do. Many desktops as well as laptops the clock will run faster and faster as the battery gets weaker and weaker. Too weak and the clock won't remember the time and date. And they will usually act like you just hit restore to factory settings. Which will at least be useable most of the time. Can you get into the setup at all? If not, bummer! There are some manufactures that play a dirty trick if the CMOS/Clock battery dies. As they won't bootup at all. And I seem to recall the trick is to replace the battery and then do a hardware reset (by jumping pins). Sorry I can't be more helpful! :( -- Bill |
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| Re: IBM thinkpad 2647 CMOS battery failure ?? Al Dykes wrote: > What kind of error messages result from a failed CMOS battery on a > laptop? > > I'm looing at a dead ThinkPad 2647 laptop. When I power it up I get > PCI errors and no I/O devices seem to be found. > > When googling for the hardware manual to find out how to remove the > disk to recover data I'm reminded of the CMOS battery. It's been many > years since I saw a dead battery make a mobo lose it's mind and I > wonder if it's worth replacing the battery (It's an FRU) before I > declare the machine dead. It's very rare for a CMOS battery failure to cause a problem like this. The CMOS battery only powers the RTC/CMOS when the system is off AND the battery is out AND the power is disconnected. On a desktop, with the advent of ATX power supplies, the RTC/CMOS is powered by Vstby, as long as the owner doesn't make the mistake of turning off a power strip that the machine is plugged into. Still, if you can find the CMOS battery it wouldn't hurt to replace it. |
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