[ltp] T61 screen flickering

[Hendrik-Jan Heins]

I actually know this issue from a Sony VAIO.
Apperently in these it is related to broken capacitors in the power
supply for the backlight.
With the VAIO's the problem started on battery (the lower the battery
capacity the worse the issue), and gets to a point where without
constant power connection the screen always flickers. The solution
there is  to change out the backlight electronics
Not sure if the issue is the same in Thinkpads, but it sounds very similar.

Hendrik-Jan

Op wo 28 apr. 2021 om 02:53 schreef cr <cr at orcon.net.nz>:
>
> My experience is extremely limited, so please read this accordingly.
> I don't know if this helps, but the screen on my T400 failed in a similar
> way, and I just replaced the backlight (quite cheap on Ebay, around
> $15).
>
> Taking the screen off was straightforward, just following the
> service manual (free pdf download from Lenovo's site), but it didn't
> cover replacing the backlight, I found a couple of Youtube videos that
> were near enough as a guide.
>
> Have to be very careful with the backlight tube, it's quite delicate
> and fiddly until fixed in place.   (I broke one, fortunately since
> they're cheap I'd bought two).
>
> HTH
>
> Chris
>
>
> On Tue, 27 Apr 2021 21:01:32 +0200 (CEST)
> tomtom at tutanota.com wrote:
>
> > Hi everybody!
> >
> > I have an old but so far very reliable T61, as a kind of kitchen and
> > living room laptop.
> >
> > Now, since a few days, the screen started flickering at a rather high
> > frequency, it gets worse when I turn up brightness, and there is a
> > weird whirring / buzzing sound, rather silent, but it gets louder
> > with turned up brightness. Also, sometimes areas that should for
> > example be white turn a bit pinkish or even orange, mostly just for a
> > short time. Other than that, the picture is clear.
> >
> > Any idea what this could be? At first, I hoped it could be just a
> > connection problem, the plug could have gotten loose, but I rather
> > sure that's not it.
> >
> > So now I'm mostly wondering if exchanging the screen itself would do
> > the job, or could it be the GPU that is about to die?
> >
> > I'd appreciate any suggestions, and thanks for reading!
> >
> > Cheers,Tom
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