Re: [Thinkpad] Thinkpad crashes windows whenever AC power is notconnected

You have a bad system board. Could have told you that in the first place.
----- Original Message -----
From: "Yaowu Xu" <yaowu@urgrad.rochester.edu>
To: <thinkpad@stderr.org>
Sent: Tuesday, February 20, 2007 5:12 PM
Subject: Re: [Thinkpad] Thinkpad crashes windows whenever AC power is
notconnected

> A little update on the issue.
>
> Ordered a brand new battery from Lenovo, received it several weeks
> after the order. (the snow storm in the Northeast delayed its delivery
> by a week or so.). I charged the new battery for a day, then unplugged
> the AC power and guess what...
>
> The machine still crashes after a while.
>
> On another note, the linux FC6 crashes also if I let the machine idle
> long enough to the point FC6 tries to go into suspend mode
> automatically. And machine worked fine in safe mode of windows XP or
> for as long as I tried without AC power.
>
> Put in summary.
>
> With all software restored to factory condition:
>
> 1. With AC Power plugged in, everything is good.
> 2. On battery, Windows XP crashes a few seconds to a few minutes after
> AC unplugged. When it crashes, the screen shows some random block
> pattern.
> 3. On battery, Linux Fedora Core 6 works ok as long as it does not go
> into suspend mode by itself.
> 4. On battery, Windows XP safe mode works fine.
>
> Things tried:
> 1. new battery,
> 2. added memory module pulled out
> 3. cdrom module taken out
> 4. disabled wireless card from bios.
> 5. disabled pci power management from bios
> 6. disabled almost all power management from bios
> 7. swtiched to a new hard drive
>
> none of above makes any differences.
>
> So I am really running out of things to try now. I started to suspect
> something wrong with the hardware, like motherboard, graphics card.
>
>
>
>
> On 1/31/07, Yaowu Xu <adam.y.xu@gmail.com> wrote:
> > I did a quick try of RAM swap, but not helpful.
> >
> >
> > On 1/31/07, Rob Bell <RobDBell@mailworks.org> wrote:
> > > I once had a 770 that was finicky like this. That system was running
> > > Win98 and would crash when switched to battery power. It turned out
to
> > > be a RAM issue. Something about switching to battery caused the
system
> > > speed to fluctuate in a way that made Win98 unhappy with the RAM.
> > > Removing the particular RAM module eliminated the issue.
> > >
> > > Might be unlikely that your issue is the same, but I thought I'd relay
> > > my experience. Maybe try removing one or all RAM modules and see if
> > > that has any affect.
> > >
> > > Rob
> > >
> > > Yaowu Xu wrote:
> > > > I got this strange issue that has puzzled me for a few weeks now. It
is a
> > > > thinkpad R51. The machine crashes and restarts a while after AC is
> > > > unplugged, the time ranges from a few seconds to a few minutes. The
boot into
> > > > windows would also fail and reboot if no AC is connected. Battery
pack
> > > > only seems
> > > > to work fine with linux (FC 6), lasting a hour or so.
> > > >
> > > > I tried almost anything that I can think of, updating drivers,
restoring
> > > > to factory condition, swapping hard drives, taking suggested steps I
could
> > > > find in forums/support faqs for anything related to crashes on
> > > > thinkpad. But so far nothing helped.
> > > >
> > > > I would love to hear any suggestion. Thanks in advance.
> > >
> > > ______________________________________________________________________
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> > >
> >
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Received on Tue Feb 20 18:09:06 2007