Question about Sanyo AVM-2759S 27" TV

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White Lines in picture

Our TV has approximatley eight small lines that run across the top of the television. One of the lines only runs halfway across the screen. These lines are thin, like a pen line. Anyway, what is wrong and how do I fix it?

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Re: White Lines in picture

Your problem is common for sanyo and fisher tv's the B+ feed capacitor is defective and maybe the waveshaper in the cuircuit right next to the IC. Your probably gonna need a service manual to find these caps as if you get one from sams photo facts post the vertical here and I will show you the capacitors to change. Done it a hundred times but I dont remeber the #s. Old age I guess. Good Luck

Posted on Apr 24, 2006

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Without seeing the lines I can't be sure what your set has wrong, but here are a some possibilities:

If the lines are lines are confined to the top inch or two of the screen and the picture looks otherwise normal, the trouble is bad capacitors in the vertical output circuit. Fixable by replacing the bad parts.

If diagonal lines are across the entire face of the picture tube and the picture looks washed out, the trouble is often a bad capacitor on the 200-volt line to the picture tube. This may be on the main circuit board near the horizontal output transformer, or on the small circuit board plugged onto the end of the picture tube. Again, replacing the bad capacitor can fix this.

If your TV is actually an RCA, someone may have bumped a rear-panel adjustment. On the back of the TV near the bottom right are two small knobs. RCA left these adjustments exposed inside of putting them inside the set like other manufacturers. These sometimes get bumped if someone was behind the set cleaning, or if a pet got back there and hit them with a tail. The top knob adjusts focus, and the bottom knob adjusts something called G2 or screen voltage. If this gets turned up too high it can cause the faded picture and diagonal white lines. Turn the adjustment down until a black screen looks black instead of gray.

A bad picture tube or horizontal output transformer can also cause lines through the picture. If this is the case with your set, it's time for a new TV. The transformer is relatively inexpensive but labor costs aren't, and the repair bill may exceed $200. If the tube is bad, there's no point even considering repair. The tube cost alone exceeds the cost of new TV.

Hopefully your lines are easy and cheap to fix. Good luck, and thanks for using Fixya!

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No. Are the lines white or black? Does the picture look distorted at the top? Is there a chance it is still under warranty? It sounds like a problem in the vertical retrace circuit. Probably a capacitor near an IC that's used for timing. You shouldn't be having this issue already. A tech should be able to see a distorted waveform in the vertical section. Hope this helps.

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