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Dell 19" Trinitron, loss of focus

M

Morten Kammen

Jan 1, 1970
0
I tried to search this group for my problem, but didnt find any
matches, maybe because my problem description is somewhat lacking in
correct terminology :)

My 5 year old monitor has suddenly started losing focus/becomes blurry
about one hour after I turn it on. A switch off/on cycle will restore
the picture to former glory for about 5-10 minutes.

The loss of focus/blurriness is uniform all over the screen. The last
few days before the problem started, the monitor would emit a clicking
noise and a short flicker could be seen across the screen. This can't
be heard/seen anymore, so I'm guessing that this component burned out
and now causes my problem.

Any ideas, is it fixable for a small amount of money or is it ready
for the scrap heap?

regards
Morten Kammen
 
3

3T39

Jan 1, 1970
0
Hello, Morten!
You wrote on Thu, 22 Sep 2005 15:47:11 +0200:

MK> My 5 year old monitor has suddenly started losing focus/becomes blurry
MK> about one hour after I turn it on. A switch off/on cycle will restore
MK> the picture to former glory for about 5-10 minutes.

MK> The loss of focus/blurriness is uniform all over the screen. The last
MK> few days before the problem started, the monitor would emit a clicking
MK> noise and a short flicker could be seen across the screen. This can't
MK> be heard/seen anymore, so I'm guessing that this component burned out
MK> and now causes my problem.

MK> Any ideas, is it fixable for a small amount of money or is it ready
MK> for the scrap heap?

It might be a failing line transformer, but the first thing to check is the
CRT panel for a bad solder joint where the focus lead is connected,.
Be sure to follow the safety procedures outlined here
http://repairfaq.ece.drexel.edu/ regarding discharging the CRT.

With best regards, 3T39. E-mail: [email protected]
 
W

Wins

Jan 1, 1970
0
Hi!

Just check the CRT base and get it replaced, would cost peanuts.
 
J

JANA

Jan 1, 1970
0
Hi have had a defective flyback and HV assembly cause this type of fault in
monitors. Also a failing CRT can cause this type of display as well.

--

JANA
_____


I tried to search this group for my problem, but didnt find any
matches, maybe because my problem description is somewhat lacking in
correct terminology :)

My 5 year old monitor has suddenly started losing focus/becomes blurry
about one hour after I turn it on. A switch off/on cycle will restore
the picture to former glory for about 5-10 minutes.

The loss of focus/blurriness is uniform all over the screen. The last
few days before the problem started, the monitor would emit a clicking
noise and a short flicker could be seen across the screen. This can't
be heard/seen anymore, so I'm guessing that this component burned out
and now causes my problem.

Any ideas, is it fixable for a small amount of money or is it ready
for the scrap heap?

regards
Morten Kammen
 
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