Re: [Thinkpad] Dead Thinkpad (Power Problem)

So in other words you had a bad battery. Common problem
----- Original Message -----
From: "Felix E. Klee" <felix.klee@inka.de>
To: <thinkpad@stderr.org>
Sent: Saturday, December 04, 2004 7:48 PM
Subject: Re: [Thinkpad] Dead Thinkpad (Power Problem)

> On Thu, 02 Dec 2004 03:00:57 +0100, "Felix E. Klee" <felix.klee@inka.de>
> said:
> > I plan to investigate the problem more in depth later today and I also
> > plan to study the HW-MM. But, maybe someone has an idea what may be
> > the cause for the problem?
>
> Yesterday I saw behavior that I've never seen before and that isn't
> documented: At one time the battery symbol was blinking in green, at
> another it was glowing in green and orange at the same time.
>
> I then disassembled the computer but couldn't find any defect on the
> system board at first sight. The socket for the power plug is still
> sitting firmly on the board. But maybe it is broken nevertheless, or
> maybe something in its vincinity is broken. Anyways, I put the machine
> back together and settled for a quick'n'dirty solution:
>
> I took apart an old battery pack (I've three) and removed the cells.
> Then I put a socket for an external power supply into the case and
> soldered that to the battery's plug. In addition, I had to solder the
> battery's thermocouple to the plug (otherwise the machine doesn't accept
> the fake device). Finally, I reinserted seven of the eight cells (their
> weight is necessary to prevent the machine from onto it's back) and
> glued the battery pack back together. The machine now runs fine again.
>
> For charging the remeining two batteries, I use an external battery
> charger from IBM.
>
> Felix
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Received on Sat Dec 4 20:20:13 2004