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clean the jack on the back of the tv. might be losing connection, can also be the the cable connection. so try using a different one, switch cleaner and the tv off at power before spraying the switch cleaner. also use an old tooth brush to remove any dirt. and spray again don't turn tv back on till it has dried. if after all this and its still the same this could be a problem with the connection to the board, and could need re soldering back on. or the controller chip for the av control has a problem, can be a build up of dust that has made its way into the chip joints, switch cleaner and brush should clen this out. dry joints on the board can also do this as when thy warm up they will disconnect and be no signal. while you have the back off the tv clean out the dust build up even on the back of the boards with an paint brush and a hoover. this will help the tv. clean out as much of the dust out as you can. but don't be to ******* the av board as this has small parts on this and if you knock a resistor etc off you will not be able to find were its from without a semantic. just spray switch cleaner and wipe around with the brush.
When more dust accumulate, and absorbs moisture from the atmosphere, ther is a chance to get arcing. Clean the device by using a vaccum cleaner if possible. Burned degaussing coil cannot be repaired. It should be replaced along with degaussing posistor.
If you are electrically inclined, you can replace the cable jack on the TV ... but it will require some doing. You will have to open up the TV and find the circuit board with teh coax jack on it. take a soldering iron and remove the coaxial jack from the circuit board. Make sure you don't overheat the circuit board while you are doing this, or you will burn out the whole board. Once the jack has been removed, take it to Radio Shack, or a similar store, and find the exact same part. Then reverse the process -- attach the jack without overheating the circuit board, and put the TV back together. ****If you are not VERY good with electronics, don't try this unless you are not afraid of losing the TV -- it is VERY easy to burn out a circuit board.
If there is a TV repair person in your area, it would be a good bet that they can fix it for you at a reasonable price -- just be sure to tell them that all you need is to have the coaxial jack replaced. This way they can only do what you are asking for, and can't charge you for repairs you did not need.
This tv needed CRT Tube discharge.Take the tv aparts,take out the CRT video board,must plug it back in."Highvoltage becareful",find a wire with good insulations,grounded itself in with a screw from a steal frame.High voltage "Take that wire go close to the CRT tube without the video board connect in.Than u will hear a pop,that the highvoltage,just discarge ur CRT bad contamination.The tv should be clear now,after putting it back together again,getting it working.
Use a soft lint free cloth and any glass cleaner. The trick is to spray the cloth instead of the TV screen. Spraying the screen itself could let cleaner run too far down and on to the circuit board. Thanks for using fixya.
If the TV "goes out" meaning that you lose tuning (picture gets very snowy, disappears totally, etc.) but the power stays on and is otherwise normal, the trouble is often because of bad connections inside the tuner.
It is possible to remove the tuner from the circuit board, open it up and resolder the connections that typically go bad. (Usually they are solder joints connecting the ground traces along the edges of the tuner circuit board to the metal box it mounts in, and some other ground points on the board. Often they are visibly cracked.)
To this requires electronic soldering skills and the tools to make the repair. It is possible to do additional damage to parts because of small connections, fragile parts and so on), so this may not be something you want to try as a first project. But if you can do the soldering and are patient, it is possible.
On the other hand, if "going out" means the set suts off completely, there are too many things that might cause this to offer any suggestions for things you might try on your own.
The IR sensor on the main circuit board may have gotten zapped or possibly the window where the IR signal passes through may need cleaned. It's located on the front of the set near the control buttons.
the fluid has found its way down to the buttons. Slide the circuit board out and clean the switches with an electronic contact cleaner and toothbrush, it will evaporate quickly but make sure it is dried and give it a try.