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Chris George Posted on Nov 15, 2006
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Red CRT is going out

The red crt for the set is going out, there are horizontal lines flickering back and forth through the screen near the bottom of the picture and it is getting progressively worse. Is this problem worth fixing? Or should I replace the tv?

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  • Expert 398 Answers
  • Posted on Jun 26, 2007
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Joined: Jun 26, 2007
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One of the convergence IC's is going bad and needs to be replaced.

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0helpful
1answer

Tv flickering

A flickering screen and or lines and or black bars at the top and bottom of the screen are signs that you need to replace any small electrolytic capacitors that are near the horizontal and vertical output transistors. any that are on the board on the back of the CRT and possibly capacitors in the high voltage section of the board. This is a cheap maintenance that is wise to do before any expensive parts go.
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36' toshiba with red screen and glowing horizontal lines.

Bad connections on red drive transistor on crt module. Resolder all connections on crt pcb.
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SONY KV-32TW67 FAINT GREEN AND RED LINES ACROSS WHOLE SCREEN

friend maybe your LCD was broken or loose. try to pull gently if it return to normal image.

2helpful
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No red in the image on the screen

The adjsutment that you turned down was the G2 voltage to the red tube which is just a temporary fix for a CRT which has a short developing in it. Try turning up the red adjustment again only slightly to see if the red CRT ( tube) will light up
if it does and then the set shuts down its most likely the red CRT which is bad . If it lights up but you get retrace lines but doesnt shut down it possible that its the CR board ( Red CRT Drive Board) which is at the very bottom of the red tube.
0helpful
1answer

My screen have some red lines

I will assume from you description that this is a rear projection crt(picture tube) tv. if this is true I have good news/bad news.
faint red horizontal bowed lines in the picture indicate the screen(G2) voltage for the red tube is too high.Slight lowering of the G2 adjustment will eliminate these lines. I stress SLIGHT because too much adjustment will mess up the gray scale .
The bad news the red crt made be bad. if the adjustment works but in the future the problem reappears then suspect the red crt.red crt replacement is probably not economical to repair.
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Convergence issue on Curtis Mathes CM19033S TV

try this will help u when my tv shows the problem i refer to this site onlyhttp://www.answers.com/topic/television-...
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1answer

TV Flickers red lines across tv screen

Sounds like you have an intermitant overdrive situation on the red CRT. This could be caused by a bad component on the Red CRT board, an intermittantly shorting CRT or the circuitry in the main board. You should not run it until the problem is resolved as you could damage the CRT if it is not already bad. This is something that unless you are a qualified tech you are not going to have any success resolving. It should not be very hard for a good tech to diagnose the problem. Costs will depend on the part which is bad. If it is the red CRT it probably is not worth fixing, but it could be a 50 cent capacitor. Certainly worth the cost of a service call. Good luck.
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1answer

Red lines across screen

it sounds like a b+ cap going bad and is intermittant that feeds the the video drivers on the crt pcb or the crt is shorting. I have seen intermittant shorts in crt before.
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