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Re: Monitor Problem???

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On 03.01.2021 16:58, Stephen P. Molnar wrote:
> My main computer runs  Debian Buster and is displaying some unusual 
> behavior.
>
> The monitor is blanking, without warning, at random times, and 
> restoring the screen  while I working. There is no warning, nor does 
> the computer seem to be overheating (I continuously monitor the 
> temperature).
>
> I rather suspect that it may be a hardware problem. I keep the 
> software up to date.
>
> I am querying this group because I can't think of a more knowledgeable 
> source. Any thoughts and suggestions of things that I might be able to 
> test will be very welcome.
>
> Thanks in advance.
>
What is model\make of the monitor? For how long was it in service?
Does it have a power led indicator? Does it change color from green 
(normal mode) to yellow (standby mode) during blanking?
Does it have an internal or external PSU?

 From the description it sure does look like the monitor is the culprit 
and it is hardware problem.
I'd suspect dried out electrolytic capacitors on power lines. They need 
to be inspected and replaced with a new ones.
Or it could be flaky ribbon cable connections between internal PCBs 
and\or LCD. In this case you need to clean contacts of the cables with 
rubbing alcohol. Let them to dry out completely, before reassembling 
monitor.

-- 
With kindest regards, Alexander.

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Monitor Problem??? "Stephen P. Molnar" <s.molnar@sbcglobal.net> - 2021-01-03 13:00 +0100
  Re: Monitor Problem??? Georgi Naplatanov <gosho@oles.biz> - 2021-01-03 13:20 +0100
  Re: Monitor Problem??? "hdv@gmail" <hdv.jadev@gmail.com> - 2021-01-03 13:30 +0100
  Re: Monitor Problem??? "Alexander V. Makartsev" <avbetev@gmail.com> - 2021-01-03 13:30 +0100
  Re: Monitor Problem??? Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-03 15:10 +0100
  Re: Monitor Problem??? Gene Heskett <gheskett@shentel.net> - 2021-01-03 16:50 +0100
  Re: Monitor Problem??? David Wright <deblis@lionunicorn.co.uk> - 2021-01-03 17:40 +0100
    Re: Monitor Problem??? "Stephen P. Molnar" <s.molnar@sbcglobal.net> - 2021-01-03 17:50 +0100

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