Question about RCA 27F500TDV 27 in. TV/VCR/DVD Combo

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Several dozen thin horizontal white lines across the top of screen, all channels

I have several dozen thin horizontal white lines appearing at the top of the screen. They are there on every channel whenever the TV is on. I have not tried a fix.

Posted by Brad East on

  • Neta1979 Dec 12, 2007

    Mine is doing the same thing. It is very irritating to watch tv with lines going through the top of peoples heads.

  • paul2541 Jan 25, 2009

    There is several white lines at the top of the screen on all channels. Looks like the screen overlaps.

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Anonymous

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  • Master
  • 3,130 Answers

These beasts are monsters to get into and service without the proper extenstion cables and a service manual. there are no user replaceable parts inside this set. if you know solid state serviceing, you can try and fix it. There is a bad capacitor or capacitors in the vertical sweep circuit and or the vertical output IC is bad also. If you can solder and unsolder go for it. But if you do not or know how the circuit Works Please find a trained tech to assist you with this repair. Good Luck. PS please do not forget to rate this.

Posted on Oct 14, 2006

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1 Answer

White line across screen
If your LCD TV or monitor has stopped working, or is displaying one of the following
symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can
examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life
of your monitor or TV by several years.

Take it to a repair shop.

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There are white thin horizontal lines across the top 2" of Toshiba 27DF47 TV. Can this be repaired and how much would this repair cost?
Check and replace all the electrolytic capacitors at its vertical output section circuit. There will be five or 6 of them. Replace all.

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problem could also be inside the display panel.

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1 Answer

Wavy horizontal lines across the screen
It sounds that the main power supply section to your TV has the fault. The horizontal thik lines that appears crawling down across the screen should be of video 'HUM'. Have you replaced the main filter capacitor at the power supply section? If not, replace it along with the main rectifier. The AC power is rectifed by a bridge and applied ot this main filter capcitor. It will have a capacitance value between 120 to 350MFD 450VDC. Check this section. Measure the rectifed DC voltage acorss this main filter capacitor. It should be around 350VDC, if your home power supply line is 220VAC. If it is 110AC, this DC voltage will be around 165VDC; and it should be. If rectified DC voltage found lower than the input AC voltage, replace the rectifier bridge. In some sets, this bridge section have four diodes. Some other circuits, a bridge rectifier stalk may be used.

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You got a bad LCD screen. no immediate resolution aside from getting the LCD replaced. if your system still has warranty call Dell for replacement.

Hope it helps!

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1 Answer

A horizontal thin black line has appeared across screen.
hi all .ive had the same problem,a thick black line down screen.sometimes it flickers from top to bottom and other permantly in view.but i have solved it.forget your ic boards and taking apart tv.have you got either a ps3 or wii connected to tv.if so unplug power lead from socket and relocate in seperate socket.make sure the lead is completely free of any other leads and you might just find this works.i think the power lead creates some sort of frequency that the tv picks up .good luck hope it works

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1 Answer

Thin white horizontal lines across top of TV
replace vertical out put ic and related capacitors
please refer to a qualified tv personal to check tv

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2 Answers

White horizontal, zig-zagging lines
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1 Answer

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