Question about JVC AV-27230 27" TV

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Top of the screen Picture Problem

Hi, At the top 1 1/2 inches of the screen I have small fuzzy white-ish lines then @ 1/2 inch of normal picture then one white line that breaks up and returns.I can see the picture through the top lines but seem a bit distorted. Any ideas of whats gone wrong? TV is only 3-4 yrs old and I didn't expect any problems this soon as the last JVC TV I bought didn't show problem for more than 12 years. Thanks in advance for any help!

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Re: Top of the screen Picture Problem

Sound like you have 1 or a couple of leaky/bad capacitors in the tv's vertical circuit, typically, there sould be 5 to 10 caps. in all, but you just need 1 bad one to cause your problem. good luck.

Posted on Mar 13, 2007

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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

Split screen, kind of inverted w/white wavy lines

It is a calibration problem, let me see if I can find some schematics for your tv.

Jul 19, 2008 | Panasonic CT-32SL14 32" TV

1 Answer

Visual transparent lines at top of picture

You have a vertical output circuit problem. This was common for Philips' sets. Have a repair shop check it out. Should not be too expensive to repair.

Oct 15, 2009 | Philips 27PT6441 27" TV

1 Answer

Horizontal lines across the top 3 inches of picture


what line started? from Left to right? or from top to bottom?


Nov 28, 2008 | Philips 32PT6441/37 32" TV

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

Lines at top of screen

I have seen issues with complaints of raster with vertical retrace lines at the top of the picture and capacitor 2494 needs to be removed.

Jul 23, 2008 | Philips 27MT3305 27" TV

1 Answer

Picture size is shrinking within screen

hi there, you have vertical section prob., repalce imeditely the electrolytic capacitor at the vertical section. do some test and check up. ty

Feb 18, 2008 | Philips 27MT3305 27" TV

2 Answers

Tv help!

When you have the back off, look for the flyback (high voltage) transformer. This is the part that has the thick red wire protruding from its top which attaches to the top of the picture tube with a suction cup. On the flyback there are 2 controls, the bottom one is screen and the top one is focus. Turn the bottom control (screen) down (counterclockwise) until the white lines go away and the brightness looks normal. Then turn the top control (focus) until the picture is nice and sharp. If the F connector has been pulled out and the TV has RCA (red, white, yellow) jacks, use those jacks and set the TV to INPUT.

Aug 13, 2007 | Zenith A27A11D 27" TV

1 Answer

RCA 32V420T 32" TV

This RCA set uses the CTC187BD chassis. Look on the back of the set and to the right of the cable connector you will see 2 controls sticking out, one on top of the other. The top control is for focus and the bottom one is screen, or overall brightness. If these controls have been turned clockwise then you will have a bright, fuzzy picture with white lines (retrace lines) through it. Tune in a channel with white letters on the screen and turn the top (focus) control until the letters are crisp and sharp. Go into the menu and turn the contrast and brightness all the way down, and then turn the bottom control (screen) until you can just see the picture, just above the point where the picture is too dark to see. Go back into the menu and reset the contrast and brightness and the picture will be back to perfect.

Jun 28, 2007 | RCA 32V420T 32" TV

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