Video just reduced to a tiny horizontal line across the screen. sound is fine, what could be the problem? jvc tv model av-32720

vertical scanning circuit is Defective.this is not hard to repair.contact service technician

Well, If you are technically sound, you can fixed it, but I will like you to check the line Or Fly-back Transformer and the horizontal and vertical side of the circuit very well.

try up the screen bottom in the fly back. if yoy see a white horizontal line the tv have a cold solder in vertical ic or is bad.

Hi There,
If your picture has collapsed to just a horizontal line across the center of the screen, this indicates that your Vertical Output circuit is bad and needs to be serviced by a qualified technician. I hope this helps and thank you for using FixYa!

vertical output ic needs to be resoldered. careful leaving that bright line displayed on the screen as this will cause a permanent phosphor burn into the tube. this can not be corrected once burned unless you replace the tube. mch

A bright Horizontal Line indicates failure of teh Vertical deflection Circuits.
Get a competent Technician to have a look.

try tapping tv on side with palm and see if it works it might be a bad video chip

It sounds like a vertical deflection problem. You mentioned you had a white HORIZONTAL LINE in the middle of the screen. If this line runs from left to right across the screen it's in Verticla deflection. If it runs from top to bottom, it's in Horizontal deflection. I am assuming the problem is a Vertical deflaecion problem. The repairs necessary are most likley to replace the vertical capacitors or the verticla deflection chip.
Good Luck
Ed
NC Electronic Mills, Wyo USA

I'll bet you have vertical output IC with some pins not soldered. This IC ( integrated circuit) is a "chip" that makes the picture fill out from top to bottom. After a period of time heat will cause the pins to crack loose on the circuit board. You need to have a tech check it for you. Stargazer

This is usually caused by a problem in the Horizontal Output section, around the Horizontal Output transformer usually a capacitor or diode going or gone faulty... the line you see are the Horizontal "Retrace" lines that are useually "Hidden" when the circuit is OK..