From: Dave B. (blundar42_at_hotmail.com)
Date: Tue Feb 20 2001 - 19:39:59 EST
I am having a really wacky problem with my 560X. I plugged a bad power
supply into it unknowingly several months ago. It smelled like magic smoke,
and I got really scared. I unplugged the faulty power adapter (which I
cursed profusely) and then assessed the damage.
The notebook will run fine off batteries. The notebook will run fine with
no battery in it when installed in the super port replicator(2 type III
cardbus model). The Notebook will run fine and even charge batteries when
in the super port replicator, however it never senses that power is
connected. You can connect it to the port replicator, have it charge up a
battery, take the battery out while leaving it connected to the port
replicator and have the notebook complain about it's battery being dead yet
it is runnign off AC provided by the port rep. Go figure.
My first gut feeling was that the DCDC board was blown. I bought a 560 with
a dead screen thinking I could swap DCDC boards. This is NOT the case. The
560X uses different parts than the 560. I took a multimeter to as many of
the traces/diodes in the area of where the power adapter plugs into the
motherboard, and I checked all fuses. I failed to find anything obvious
liek diodes or fuses blown.
Anyone have any ideas what is blown? If the notebook ran find off of AC but
did not charge batteries, I would be certain it was the DCDC board.
However, it will not turn on if you connect a external power adaptor to the
port on the back. Is it the motherboard or the DCDC board? I am
comfortable enough with a multimeter that I know how to test transistors,
diodes, resisitors and fuses. However, I am a little bit lost when I look
at this machine's motherboard without schematics. I can do surface mount
soldering if I have to. I am getting sick of my thinkpad being sick. I
can't afford to buy a new one, and not being able to plug it in on the go is
getting frustrating.
Thanks in advance for any help
-Dave
PS I Do not think I can subscribe to a 50message/day mailing list without
overflowing my nearly overfull crappy hotmail box. If you wouldn't mind
carbon copying any response you have to this to me,
blundar42_at_hotmail.com.nospam (take nospam off end of addy - I hate email
gathering bots) i would really appreciate it.
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