I have an older Sharp t.v. (19"). Last night something happened and there are now lines across the screen.
Answer:
From my experience this usually caused by one of the resistor in the board attached to the CRT neck burns and need to replace. I think this is cheap.
For a tv to have lasted 10 years in this era is pretty good, I think. Lines are not good. Anyway, wouldn't you like to treat yourself to a nice up-grade?
throw your tv away (it's getting old). you will only get more problems with it over time, getting it repaired will probably cost you more than buying a new one..
From the little that I know I think it's the horizontal hold, and it's very expensive to repair($200-$300). It would be cheaper to buy a new TV.
Look for and adjust Horiz hold control or it could be labelled line hold or hor frequency. Might not fix the problem if some thing caused it ( other than child etc twiddling ) . Give it a try, oh one more thing , it is not repeat not your pic tube !
Cheers Pete
Just re-read your question-- if you can see the picture then another possibility ( from my experience ) could be the 10mfd 200v electro capacitor that connects to the 180 volt supply to the 3 video amps on the neck board ! very common fault even now ! Cheers Pete
Arcanium you had better go back to school --lines from side to side is definatelely horizontal , top to botton is vertical as when pic is short from top to bottom ( height )
The horizontal driver is NOT linked to the power supply. The power supply reg transister just happens to be switched at line frequency !Cheers again Pete
Good sense from PEACHY
I don't think it is the Horizontal hold.
1. If the lines go across your screen I would assume you mean left to right then it is a vertical deflection driver problem.
2. The horizontal driver is also linked to the power supply. If the frequency is off, then everything is gonna be fouled up.
It definitely isn't a tube. DO NOT TRY TO REPAIR THIS YOURSELF. It should be a reasonably cheap repair. If there is a community college near by, check to see if they have a video servicing lab. That's what we had at my school and we fixed many TV's for the price of parts.
Could be lots of things. In order to make a more accurate diagnosis, we'd have to see the picture. Perhaps, you could take a digital picture of it and post it on webshots.com or photobucket.com so that we could have a look.
The answers post by the user, for information only, CeQnA.com does not guarantee the right.