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Dell 19" Trinitron, loss of focus

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

Reply to
Morten Kammen
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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

formatting link
regarding discharging the CRT.

With best regards, 3T39. E-mail: snipped-for-privacy@hotmail.com

Reply to
3T39

Hi!

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

Morten Kammen wrote:

Reply to
Wins

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 _____

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

Reply to
JANA

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