<<<>> hello i have a big screen rca its around 1980 something . and its making a hissing noise , picture is fine and the sound is fine as well ...can you please tell me what the problem is ..

Hello erl, hi.... the hissing noise is usually caused by high voltage arching, but this is suppose to be soft. if the hissing is unusually loud, the high voltage transformer clip cap may be loose, this may cause the horizontal line you see on the screen. take precaution when dealing with this.... here are steps that may help..

1. unplug the unit. allow around 5 minutes for all voltages inside the unit drops to a safe level.
2. open the back cover. place the monitor face down on a table with a dry clean rug or towel.
3. locate the picture tube. on the top side you will see a wire with a cap at the end.
4. use or wear a cloth glove and feel if the cap is loose. re clip the cap and make sure it is secured.
5. replace the back cover.

this noise is caused by a defective power brake vacuum booster, (big round thing behind the master cylinder) the diaphragm is leaking vacuum.

if you heard a hissing or like static sound your board probably has a hole in it now. the board on the left side with the flyback fransformer. the hole is from where a prong has come loose an is arking over an it burns the board the ark is the sound you heard.

can be a faulty mains board, does the sound still work? if not, can be mains board, and at last if there is a continuous clicking sound it a faulty power supply.

hope that help

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hissing noise indicates to me you have a high voltage problemm... likely a flyback. could be a crt or splitter. if its the flyback then the horizontal transistor could have blown. I would not suggest working on this unless you have had some electronic experience.

A 1995 60 inch rca good picture and sound. Then it started a cracking noise and a hissing sound, then the picture went blurry. then it was nice picture and sound, then it died. took the back off and turned out the lights. Plugged the tv in and out from the wall socket and there was a sparking noise and a small arc when i plugged it in and out a few times ,at the part that the power plug plugs into.The white part that is beside the white power plug part has thick red wire coming out of it and goes into another plug that has more red wires in it. but the big white part beside the power plug part looks burnt and has black powder on it. that part is probably the problem but maybe not, what it the name of that part and how much would it cost and is it plugged in or soldered.

this problem may occur due to some drysoldering of some components on the mother board...mostly in the power supply section.

High voltage and/or feedback loop voltage incorrect or missing...accordianman

I think maybe the G-board needs to be replaced. A TV shop will have to repair it. They normally start around $200.00

the base to emitter of the hot will read short on a diode checker/test on ohms it vairies but typically about 50 ohms.e to c, or b to c should have very high resistance. unsolder the collector of the hot. make sure all solder is gone. now test the ohm between your tuner ground & the pad of the hot collector it should read open.