On Tue, 22 Oct 2002, Tony Duell wrote:
> > seems to have HV ok, but doesn't display any picture - but it appears to
>
> OK, check all the CRT voltages -- almost certainly one is missing. It is
> _very_ uncommon for the deflection system to fail in a way that forces
> the beam off-screen.
OK, I can make it display a picture - if I press a button that displays
the OSD, it'll play the OSD with a properly sync'd image in the
background. However, the image very quicky (possibly somewhat random
timebase) fades in and out, as if the brightness was being adjusted at a
very fast rate. If I'm lucky, when I press a button to disable the OSD,
the monitor will get 'stuck' in a brightness level that makes the picture
visable. Simply trying to adjust the brightness and contrast with the
front-panel controls offers no solution.
> > be powered up ok. The D11 won't switch out of powersave mode.
>
> Assuming it fully powers up when it detects a valid sync signal, I would
> start by checking it's getting sync (no sillies, like a broken cable!),
> then look at the sync input circuitry. Alas it could also be the
> microcontroller (I assume it uses a microcontroller to control things
> like this -- most modern monitors seem to) that is not responding the the
> sync input signal.
I'll take a look at that once I get this E20 off of my workbench...
-- Pat
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Received on Tue Oct 22 2002 - 19:28:00 BST
