[Thinkpad] Thinkpad crashes windows whenever AC power is notconnected

[Alex Austin]

Why didn't you?

On 2/20/07, Bruce Markowitz <scosgt at worldnet.att.net> wrote:
>
> You have a bad system board. Could have told you that in the first place.
> ----- Original Message -----
> From: "Yaowu Xu" <yaowu at urgrad.rochester.edu>
> To: <thinkpad at 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 at gmail.com> wrote:
> > > I did a quick try of RAM swap, but not helpful.
> > >
> > >
> > > On 1/31/07, Rob Bell <RobDBell at 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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-- 
- Alex Austin
Circuitsoft Computer Services
(651) 238-9273
www.circuitsoftcs.com

"...and then I visited Wikipedia ...and the next 8 hours are a blur."