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Rca tv G31750WKA

Hello. My tv has a white screen with horizontal lines. Is this something I can fix or hire a professional?

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2 Suggested Answers

techman
  • 3130 Answers

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

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

megatronix
  • 57 Answers

SOURCE: white horizontal lines at top of picture

Yes, definitely worth fixing. The problem lies in the vertical deflection voltage-doubler circuit. The usual fault is a single capacitor of 100uF/35V that has failed. It is normally connected to a rectifier diode right at the vertical IC. Replacing the capacitor (no more than USD4.00 in price) usually gets it working perfectly again. If you are finicky around technical work, then a reputable local repair shop in your locality should do it quickly for you and charge only labour.

Posted on Jan 18, 2008

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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

White line only, has sound, may be 14 yrs old.


Hello
If there is a white line across the screen, the vertical output section of your TV is faulty. If the line is vertical at the middle of the screen, horizontal deflection yoke doesn't get sweep signal. You haven't mentioned about the full mode number of your RCA TV. Therefore I can only give you this much hint. OK.

Mar 06, 2011 | RCA Televison & Video

2 Answers

The sound is great, but the picture has gone to gray with horizontal white lines across the screen. It is 20 years old, and probably not worth fixing, but i will ask anyway, just in case it is a simple...


Hello Sat, hi, its a failure of the horizontal output transistor responsible for high voltage. This transistor is needed to be replaced. you need a TV tech guy to have this fixed. have it checked first, the trouble is common to CRT type TV really easy to fix. for a tech guy.

Dec 07, 2010 | RCA Televison & Video

1 Answer

My RCA console tv has white horizontal lines accross screen, picture is very light and sound is ok, very frustrating. I know its an old tv, but appreciate any response. Thanks


Cold solder joints on the flyback transformer circuit board - probably because RCA used feed-thru steel rivets on their boards. Re-solder the connections using a good solder flux for clean solder joints and this will fix prob. The joints with the dull, pitted finish are the problem joints.
S. Hampton

Jan 26, 2010 | RCA G35773SK 35" TV

2 Answers

RCA-single horizontal white line


Your vertical deflection IC is bad.

Nov 04, 2008 | Televison & Video

1 Answer

RCA F32650 32" White lines with hazy white flickering


Absolutely right about the transistor and also check any adjacent resistors to the transformer and to the line output transistor. Good luck.

Sep 19, 2008 | RCA F32650 32" TV

1 Answer

Horizontal Lines


RCA is not a good tv brand as far as i can tell but other than that you may need to have your tv looked at before something else happens. You may have 1 or 2 bad IC's.

Jan 21, 2008 | RCA TruFlat 27F520T 27" TV

1 Answer

Rca projection screen problem


I have a Toshiba 27D46 TV that comes on great.. but within 5 minutes goes black with a white line horizontal midway across the screen. Any fix solutions? HELP..!!! Chip

Jan 06, 2008 | Televison & Video

1 Answer

32 in RCA MODEL NUMBER f32650


TV FINE UNTIL 2 NIGHTS AGO HAVE HAD 4 YEARS, STARTED HAVING A FOGGY SCREEN WITH WHITE HORIZONTAL LINES. HAS SOUND A FOGGY SCREEN WITH WHITE HORIZONTAL LINES. called retrace lines please check 1 screen control on eht transformer is mituned 2 supply to screen of crt 3 supply to rgb video output is absent 4 connector loose 5 crt base loose thanks

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1 Answer

Screen displays Horizontal white lines


try adjusting the screen control down..if this has no control unit may have a bad video drive circuit or possible bad crt or fly back transformer ...just a wag

Feb 06, 2006 | RCA F36649 36" TV

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