Question about Zenith SY2765S TV

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White Lines and Bright Screen

Last night when I turned on my TV I heard a loud click like a static shock.
Right after that the screen was very bright and I couldn't see what's on, so I left the TV off for a while and turned it back on.
The screen looked normal, but then 2 seconds later I heard a click (not as loud as the 1st time) and the white lines showed up then started to dim out. The screen is still bright, but watchable and there are dark lines when text is shown on the tv.
Left it unplugged over night and I'm still having this problem.

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Re: White Lines and Bright Screen

I believe you have a shorted transistor on the crt board on the back of the picture tube which should be Q5104. Let me tell you my experience with these Zenith's The original problem is the picture tube shorting out and caused this problem. If you replace the transistor the same problem could arise again because of the tube and it could even knock out the main board power supply. I have seen this happen. And I have put in the transistor and no problem. You can get one at the Radio Shack by taking the bad one out and get them to cross reference it for you. All Zenith transistors have a prefix number (not on the transistor) which is 121- (with the dash!) and the number on the transistor The new one must go back in the way it came out! I recommend someone with electronic soldering and desoldering experience. Hope this helps

Posted on Dec 30, 2007

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