Re: Brightness weirdness on Philips 20PT1553-00

The turning-dark-again always happens, when I try to adjust the
brightness of the picture after it turned bright. As soon as the
brightness is at approx. 2/3 the picture turns dark. The effect is not
temperature dependent (happens after 2 hours or direct after switching
on the set).

Art schrieb:
> Probably something in the bias circuitry to the CRT or in the video
> processing circuitry. Could you post the diagnostics you may have
actually
> preformed and their results?
> "ew123" <ggrps@xxxxxxxxxxxxxx> wrote in message
> news:1116418264.159887.123120@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >I recently obtained an Philips 20PT1553-00 TV set. The picture is
> > usually relatively dark. I have to turn the brightness and the
contrast
> > fully up to obtain a viewable picture. The effect of the
> > brightness-control is nearly non-existent. Sometimes (very seldom)
the
> > whole picture brightens up and the brightness-control works. This
lasts
> > usually bwetween 5 and 30 seconds. After that, the picture turns
dark
> > again.
> >
> > Has anybody experienced something like this before? Does anybody
know
> > what could be wrong?
> >
> > Thanks
> >
> > Eberhard
> >

.

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