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From: bp@www.zefox.net
Newsgroups: sci.electronics.repair
Subject: Re: What may cause LCD monitor show image for a moment and then go standby
Date: Sat, 5 Apr 2025 17:42:58 -0000 (UTC)
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RodionGork <rodiongork@github.com> wrote:
> Hi Friends!
> 
> A friend of mine got an LCD monitor (dell p2211h) for "experiments". It
> is not working - in the following manner: when connected to VGA and
> power, it briefly show image (e.g. loading screen) - for about 1/3 of a
> second - and then goes black, with power led turning blue from orange
> (which seemingly means standby mode).
> 
> If powered up without video signal it similarly blinks rectangle with
> the word "dell" for the same brief moment and goes black.
> 

Most LCD monitors allow entry to configuration menus, even with
no input connected, some by dedicated buttons on the bezel and
others by holding the power button. Do those work?

At least on my Dell monitors the LED is blue on startup and yellow 
on standby. 

Power supplies are a common villain, but if you've got an LED at
all there's at least some power....

hth,

bob prohaska


> I suggested there could be some issue in the power circuit (perhaps, of
> backlight?) and suggested she can use screwdriver to carefully open the
> case and visually check for any blackened / sparking component.
> 
> I think this is probably all she could do not being guru of electronics
> and repairs. However I wonder, if someone better acquainted with LCD
> monitors may hint whether such misbehavior is a kind of some typical
> issue and indicates some well-known problem.
> 
> Thanks in advance!
>