IBM ThinkPad T23 CMOS problem

  • Falstaff
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Post 3+ Months Ago

I inherited an old ThinkPad T23. It works fine save for the fact that on every cold boot the cmos sets to default and the date has to be reset.

I found this forum when I hit the thread on ThinkPad T23 boot problem, so I'm posting in hopes of getting a few insights before I rip the machine apart.

I assumed that the problem was a dead CMOS backup battery. I changed it. No help. I took it out and made sure the connection was firm. Seems it is (don't know how I would confirm this absolutely given how the connector is hidden by the battery bracket). And I do not have the equipment to test if the old/new cmos batteries are actually putting out 3.0V.

So.

I'm wondering if there is a connection further down the chain that could be loose, or a CMOS jumper that is incorrectly set.

I'm asking those of you who have taken this machine apart if there's something specific to look for.

I know this machine was taken apart by a non-ibm techie (a new screen was put on) and there's guarantee he put it back together properly.

Thanks for any pointers.
  • Don2007
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Post 3+ Months Ago

http://www-307.ibm.com/pc/support/site. ... 39366.html
  • Falstaff
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Post 3+ Months Ago

Thanks, Don.

I have already updated to the latest bios. Problem persists.

I'm wondering if I should try and clean the contacts and re-seat the battery.
  • Don2007
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  • Don2007
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Post 3+ Months Ago

It sounds more like a problem with the mother board itself. When the BIOS resets, what inconveniences is it causing.
  • Falstaff
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Post 3+ Months Ago

Just that I have to set the time/date.
  • Don2007
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  • Don2007
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Post 3+ Months Ago

If that's the only problem, I would leave it alone. Why do you want to do major surgery on the machine for that?

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