The TV is 6 years old. One day we switched it on and there was no picture but we could hear the sound. When we switch it off there is a horizontal white bar that flashes on the screen for a second. I would like to fix it as the TV has been great so far.
There is obviously no vertical deflection. Not a job for a handyman. Not likely to be worth the repair bill. There is, however, a few things you can check before you trash it.
UNPLUG it and take the back off. Visually inspect for anything obvious. You won't likely find anything you can deal with. If it has a vertical size adjustment control and you can locate it - you might try spraying some tuner cleaner on it - WITH THE THING UNPLUGGED.
Once you determine you can't do anything - don't waste a dime on a repair guy - put the repair cost into a new set. After 6 years - the thing has earned a decent burial. You have gotten your money's worth out it - don't throw good money after bad.
Good luck - hang in and be smart.
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Re: No Picture but have sound
Sorry Cesare, Nothing you can do. Seek a professional's help! It looks like your TV's Vertical output Amplifier IC is blown or the Deflection coils have become Short circuit or Open circuit.
It is not a job for an amatuer. Simple job for a trained TV technician. Should have the set up and running in 20 minutes.
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Connect the TV to another power outlet that you are sure, works. Try changing the input device to something you are sure works. Switch off TV manually, switch off power, remove plug and retry after 48 hours. If problem persists, please refer it to a qualified service technician.
my samsung tv model number is sp50L7hx it's 6 years old, when I turn it on it's a not really nice picture just nice sound, after 2 hours the picture is off just sound .... after I was switch off TV and switch on again ... the picture is very bad and just for a ten-twenty minutes ... what's is the problem? I'm never change the lump ... or is it a some problem with T-Con decoders board or is it a lump?
There are two easy fixes you can try. Both require you to take the back panel off. If you are not comfortable doing this, take it to a repair shop.
Place the TV face down on a soft/solid surface.
After you get the back panel off, there are three silver boxes. There are white and black wires leading from the off switch to the top silver box. Take the cover off that box.
Inside is a ceramic fuse. Test that fuse. If it is blown, your local electronics shop can find a replacement.
If not, disconnect the white and black wires from the PC board. Remove the 6 screws holding it in place.
Look for scorch marks under the board.
Cut a thick piece of plastic and tape id down over the scorch marks.
Re-attach the board with the six screws and re-connect the black and white wires.
Turn the power switch to the OFF position and plug in the TV.
Turn on the power switch while WATCHING the board you just removed.
If you hear a sizzle, turn off the switch and get a thicker piece of plasic.
If not, the TV should come back on.
Re-assemble the silver box and put the back on.
OK I got my first TV, first to repair myself that is, and I have no training at all but am kind of a tech dork wannabe. So I checked and I have sound but no signal through the TV tuner, so I hooked up my Zenith VCR to aux 1 and sound with signal appeared, the VCR tuner still works :) so I am leaning toward the TV tuner. It is visibly damaged, and I'm hoping it is as simple as a broken connection. I also noticed a vertical flash and pattern of horizontal lines when it is turned off (white). sooooo I push on.... help!!!!!!!!!!!!! :>}
Sounds like you have lost video somewhere in the video circuits. Possibly the picture tube could have gone bad or lost filiament voltage.
You can check to see if you have high voltage by holding your bare arm close to the screen. The hairs will stand up if you have high voltage. Absence of high voltage will also cause a black screen,but the sound might not work either since on some sets the power for the sound is supplied from the same circuit as
the high voltage.