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Picture tube my tv shows a white line across the screen and theirs no picture coming up,the audio is working

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This is a problem with the vertical IC section of the set its a small repair.
and well worth fixing.

Posted on Jan 09, 2009

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1 Answer

White lines across tv screen


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!

Jul 22, 2011 | RCA F35673MB 35" TV

1 Answer

Picture has lines going across


No picture tube is cheap to replace. Especially a Sony tube. And besides the cost of the tube there's the labor cost to install it and some tedious adjusting needs to be done to set up the replacement. When a picture tube fails it's time to replace the set.

Now having said all that, there are different kinds of lines that can show on the screen. Some are because the tube is bad, but others can come from less expensive parts on the circuit board in the set. Without seeing the lines for myself I can't tell you about yours. If you are wanting to keep the set, I would suggest having a qualified shop check it. The can tell you for sure if it's the tube or not, and give you an estimate for the cost of repair.

Apr 18, 2009 | Zenith C27A24T 27" TV

1 Answer

VS-50803 50" Mitsubishi No picture problem


Sounds like your picture tube has went out,, or maybe something simple,, to fix,, i would at least let a tv shop check it out ,, worth a chance ,, nothin 2 loose,, good luck

Oct 05, 2008 | Mitsubishi VS-50803 50" Rear Projection...

3 Answers

Horizontal white lines across top of TV screen


Hi I had the same problem. Broken white lines across the top of the screen. This is called overscan. You need to go into the Setup menu, other settings. 16:9 overscan needs to be on. Hope this helps.It solved our problem.

Sep 15, 2008 | Panasonic CT-2006S 20" TV

1 Answer

Insignia 32" Tube TV NS-RTV32


The vertical output IC LA7847 is failing. It will likely fail permanately and you will have just the horizontal line. The set will require service. Just do not run the set very long in this state. That thin white line can likely burn into the crt phospher and will show all the time thus ruining the glass picture tube...

Jun 05, 2008 | Televison & Video

1 Answer

Toshiba 36AF43 36" just has white line in the center


vertical output IC has loose solder joints.if you continue to let it operate this way it will etch a burn line across the face of the tube so discontinue use.

Aug 22, 2007 | Toshiba 36AF43 36" TV

1 Answer

Thin horizontal line across picture


I really dont understand the problem Could we see a picture of this please?

Jun 14, 2006 | Toshiba 35A44 35" TV

1 Answer

Red Line across Screen


sounds like you have a vertical sweep problem. Where the fault lies cpuld be the vertical output IC the verticle b+ feed, could be the capacitors in the vertical circuit?? Your gonna need to troubleshoot thr vrtical circuit if your not a tech thin my advise is to take the set to a pro for sn est. Good Luck

May 22, 2006 | Hitachi 36UX01S 36" TV

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