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Thinkpad just shuts down

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July 27, 2004 4:54:11 PM

Archived from groups: comp.sys.laptops (More info?)

Thinkpad T20, model 2647 64U, boots fine but then in five, or ten, or
120 minutes just freezes and then a minute or two later the screen
goes blank, then a minute or two after that the whole thing shuts
down. Power light stays on. I am running off of AC power so it's not
likely a power supply.

Someone said it might be the CMOS battery but I find that hard to
believe (still, I ordered one) as that merely keeps the BIOS clock in
sync.

Seems like it might be an overheating problem, but how can I check?

Any help would be appreciated.

Thanks,

bob

More about : thinkpad shuts

Anonymous
a b D Laptop
July 28, 2004 4:25:25 AM

Archived from groups: comp.sys.laptops (More info?)

The CMOS battery does more than that, but is probably not the problem
here.
Heat is a good guess. The CPU has a "pad" between it and the fan, and
there is too large a gap on this model.
Try re-seating and insulating the CPU, use silver themal grease, and
some folks have put a brass or copper shim between the CPU and the
heat sink to close the gap. This may cure it, the pad may have
deteriorated.

On 27 Jul 2004 12:54:11 -0700, bob_hatcher@yahoo.com (BobH) wrote:

>Thinkpad T20, model 2647 64U, boots fine but then in five, or ten, or
>120 minutes just freezes and then a minute or two later the screen
>goes blank, then a minute or two after that the whole thing shuts
>down. Power light stays on. I am running off of AC power so it's not
>likely a power supply.
>
>Someone said it might be the CMOS battery but I find that hard to
>believe (still, I ordered one) as that merely keeps the BIOS clock in
>sync.
>
>Seems like it might be an overheating problem, but how can I check?
>
>Any help would be appreciated.
>
>Thanks,
>
>bob
Anonymous
a b D Laptop
July 28, 2004 12:18:08 PM

Archived from groups: comp.sys.laptops (More info?)

"BobH" <bob_hatcher@yahoo.com> wrote in message
news:3ce27b36.0407271154.2a5fb2e5@posting.google.com...
> Thinkpad T20, model 2647 64U, boots fine but then in five, or ten, or
> 120 minutes just freezes and then a minute or two later the screen
> goes blank, then a minute or two after that the whole thing shuts
> down. Power light stays on. I am running off of AC power so it's not
> likely a power supply.
>
> Someone said it might be the CMOS battery but I find that hard to
> believe (still, I ordered one) as that merely keeps the BIOS clock in
> sync.
>
> Seems like it might be an overheating problem, but how can I check?
>
> Any help would be appreciated.

Mobilemeter is a great little utility for tracking your processor speed,
temperature and power usage in real time - it requires Win2K or XP.
http://www.geocities.co.jp/SiliconValley-Oakland/8259/

Does the problem occur when using battery power or alternately if you adjust
processor speed lower by using a battery power scheme when under AC, does
the lockup/shutdown still occur? This was a problem I had with my T22 -
required a MB replacement.
!