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look what i found on the ibm web page. maybe it is the same with
the 560?
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LCD Screen Flicker
ThinkPad 760
A problem has been found with the 40W AC Adapter that has been
shipping with some
ThinkPad 760 models. The system of the problem shows as a
Flickering LCD Screen when
the battery is being charged - usually within the 30-50%
region.
This problem is fixed by replacing the 40W Adapter (FRU p/n
49G2196) with the 35W
Adapter (FRU p/n 85G6701).
All ThinkPad 760 models now ship with the 35W adapter as
standard.
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On Fri, 9 Jan 1998, Poh Kian Hock wrote:
> This makes me wonder ....could it be that this particular batch or even
> worse this particular model has some quality problem. My former boss and I
> think also someone on this list said that their 560 P120 model has no such
> problem.
>
> Does anyone else having this same model also face this flickering problem?
> What about those lucky people who owns one of those 560E series?
>
> Just for the record, model and config:
>
> Thinkpad 560 2640FNE
> Pentium 133
> 8 mb + 32 mb RAM
> 1.08 gb HDD
> 12.1" TFT screen
>
> Kian Hock
>
>
> ----------
> From: Swartz, Charles[SMTP:CSwartz@unex.ucla.edu]
> Sent: Thursday, January 08, 1998 12:48 PM
> To: 'Paul Khoury'; Mike Welch; Poh Kian Hock; Sergiu Hart
> Cc: thinkpad@cs.utk.edu
> Subject: RE: TP560 : Very faint flickering of Screen
>
> Well, this is really curious. I have the very same unit - TFT - and it
> displays the flicker described, but *only* on AC. Never on battery. I
> asked EasyServ to check out the brick the last time it went in and they
> said it was fine. It makes me suspect a loose connection somewhere.
> I've never had it do this with the battery.
>
>
>
> Charles S. Swartz
> Program Manager
> Department of Entertainment Studies and
> Performing Arts
> UCLA Extension
>
> 310-825-9634 Phone
> 310-206-7435 Fax
> cswartz@unex.ucla.edu
>
> -----Original Message-----
> From: Paul Khoury [SMTP:pkhoury@loop.com]
> Sent: Tuesday, January 06, 1998 11:28 PM
> To: Mike Welch; Poh Kian Hock; Sergiu Hart
> Cc: thinkpad@cs.utk.edu
> Subject: RE: TP560 : Very faint flickering of Screen
>
> On Wed, 7 Jan 1998 14:48:22 +0200 (IST), Sergiu Hart wrote:
>
> >
> >[]
> >
> >the screen on my 560 flickers while the battery charges (until
> it gets
> >about 80 - 90% full). there is no flicker when it works on ac
> without the
> >battery, or when the battery is full, or when it is not
> attached to ac.
> >it happens with either one of the 2 batteries i have. so i
> guess it has
> >to do with the charging circuitry ...
> >
> >any suggestions are welcome.
>
> I was just thinking about this - does the machine get VERY hot
> when the battery charges? Maybe heat has a role in this
> problem. Also, are anyone's LCDs TFT, or all DSTN?
>
bye,
--sergiu--
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http://www.ma.huji.ac.il/~hart
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