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.

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!

--
to email me substitute github with gmail please

--- SoupGate-Win32 v1.05
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On Sat, 5 Apr 2025 14:26:36 +0000, 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.

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!

Electrolytic capacitors in the power supply are a good possibility.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

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!

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 4/5/2025 11:40 AM, Chuck wrote:

RodionGork <rodiongork@github.com> wrote:
Electrolytic capacitors in the power supply are a good possibility.

I think "Electrolytic capacitors in the power supply" should be step
three, after "Turn it off and back on again" and "Is it definitely
plugged in."

These three things will fix almost every computer problem :-)

PS - In the instant case, I think it probably *is* electrolytic
capacitors in the power supply. I'm sure they've turned it off and on
several times, and if it wasn't plugged in they wouldn't see the flash
of the loading screen.

--
I'm part of the vast libertarian conspiracy to take over the world and
leave everyone alone.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Most LCD monitors allow entry to configuration menus

yep, I suggested this too at first, but it doesn't react to buttons
(except power), hence the suspicion it turns off any image immediately
(which is confirmed by quick blink of some picture on power up).

As about blue / orange LED - thanks for hint, perhaps we'll figure out
what is what. It is blue when no video cable is attached and turns
orange on connecting VGA. But then after startup it again turns blue.
We'll see...

--
to email me substitute github with gmail please

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

RodionGork <rodiongork@github.com> wrote:

Most LCD monitors allow entry to configuration menus

yep, I suggested this too at first, but it doesn't react to buttons
(except power), hence the suspicion it turns off any image immediately
(which is confirmed by quick blink of some picture on power up).

Not anwering its own buttons seems like a bad sign. I imagine you've
tried any inputs other than VGA, but if not that'd be my next step.

As about blue / orange LED - thanks for hint, perhaps we'll figure out
what is what. It is blue when no video cable is attached and turns
orange on connecting VGA. But then after startup it again turns blue.
We'll see...

I've got four Dell monitors, the newest is over ten years old. All use
yellow LEDs for standby mode.

The behavior you describe is consistent with the monitor not seeing a
signal, though I'd expect to wait for at least a few mminutes before
closing up shop.

Good luck,

bob prohaska

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Dear Friends, as a follow-up of the story, I'm glad to tell that repair
was successful, even though not without curious minor incident :)

The girl, my friend, opened the case and eventually got to the power
supply board (as usually, the larger one). I explained her your
suggestion about search for faulty capacitors and when she sent along
the photo, we easily identified a couple bloating ones 220uF * 35v.

Thus I guided her to the local components shop and she replaced them
according to my instructions - though as it was her very first
experience of handling soldering iron, and my instructions were given
remotely - there were minor damages to the traces etc. Thus the thing
even stopped blinking as before. Today she brought the "patient" to me
and after some puzzling we were able to identify tiny scratch and repair
the broken trace. Works like a miracle now, thus the hint about
capacitors was 100% exact.


Here come five images: https://imgur.com/a/DddUQIp

- two bloating capacitors identified
- they are replaced
- slightly damaged traces repaired
- one last thin trace connected with wire (in lacquer isolation)
- the thing works

She expresses great thanks to everyone and says this was extremely
interesting experience :)

--
to email me substitute github with gmail please

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Sat, 12 Apr 2025 16:12:29 +0000, RodionGork <rodiongork@github.com>
wrote:

Dear Friends, as a follow-up of the story, I'm glad to tell that repair
was successful, even though not without curious minor incident :)

The girl, my friend, opened the case and eventually got to the power
supply board (as usually, the larger one). I explained her your
suggestion about search for faulty capacitors and when she sent along
the photo, we easily identified a couple bloating ones 220uF * 35v.

Thus I guided her to the local components shop and she replaced them >according to my instructions - though as it was her very first
experience of handling soldering iron, and my instructions were given >remotely - there were minor damages to the traces etc. Thus the thing
even stopped blinking as before. Today she brought the "patient" to me
and after some puzzling we were able to identify tiny scratch and repair
the broken trace. Works like a miracle now, thus the hint about
capacitors was 100% exact.

Here come five images: https://imgur.com/a/DddUQIp

- two bloating capacitors identified
- they are replaced
- slightly damaged traces repaired
- one last thin trace connected with wire (in lacquer isolation)
- the thing works

She expresses great thanks to everyone and says this was extremely >interesting experience :)

Glad to be of assistance.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)