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Sony trinitron tv, blue screen problem

 
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mushtaqilyas



Joined: 25 Mar 2006
Posts: 2

PostPosted: Sat Mar 25, 2006 3:39 pm    Post subject: Sony trinitron tv, blue screen problem Reply with quote

Hello All
The problem with my 25 inch kv-f25mf1 is that
Suddenly a blue screen with flickering angled lines appears. After a second or two it leaves. This keeps happening for a few days (weeks) and then new problems develop.

I have had to replace the system ic, RF block etc but i still can't get rid of this problem.

Regards
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JamesQB



Joined: 23 Aug 2005
Posts: 26

PostPosted: Sun Mar 26, 2006 11:48 am    Post subject: Reply with quote

Sounds like the blue cathode in the CRT has an intermittent short-circuit - a heater to cathode short. Have you elimated the blue cathode being the trouble by swapping guns, say putting the green output to the blue cathode and vice versa? If you then have a green screen with flyback lines you know the trouble isn't the CRT...
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mushtaqilyas



Joined: 25 Mar 2006
Posts: 2

PostPosted: Sun Mar 26, 2006 3:22 pm    Post subject: Reply with quote

The Problem is not permanent but rare. And if it was the short you mentioned it shouldn't cause the other components to fail with time? Anyhow I'm going to tray the swap, lets see if the problem comes up again? Could it be a dry joint?

Regards
Mushtaq Ilyas
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