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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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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 |
#2
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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 http://repairfaq.ece.drexel.edu/ regarding discharging the CRT. With best regards, 3T39. E-mail: |
#3
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Hi!
Just check the CRT base and get it replaced, would cost peanuts. Morten Kammen wrote: 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 |
#4
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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 _____ "Morten Kammen" wrote in message ... 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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