My picture tube is fine, cable signal was tested by tech. The TV mode is sometimes fuzzy and sometimes just blue. I can play DVD's just fine. Sometimes I'll play a DVD and switch back to TV/Cable mode and I'll have a clear picture. I can then watch TV until I have turn it off. When I turn it back on, same problem. Has anyone ever seen this problem? Do I need service to fix it? I appreciate any assistance anyone can give.
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During automatic tuning, you did see the pictures to each channels tuned in; at least for a second, before going forward and the TV switches back after the tuning have ended, and no channels signal is not memorized; its main system control memory IC is faulty. Contact any service technician.
The tv CRT( picture tube) have a radiaton posion infected in ur tv picture tube.This is how u discharge the CRT(picture tube) get the posion out.Take the tv back cover off.Take video board that connected to the CRT(picture tube) out.Plug it in,so u have a live current to the CRT(picture tube).Find a wire like an AV cable,should be find.One side of the metal,grounded to the metal frame somewhere.Take a long needle plier grab the other side of the AV cable wire,not the metal,(Caution high voltage live current).Come very close to the open CRT(picture tube).U will have a live current arc,than u,will hear a big "POP".U,just discharge the CRT(picture tube).The tv now the CRT(picture tube),now it good,it clear of posion infected in ur tv picture tube.Now,unplug ur tv.Put ur tv,back together.Hook up ur tv signal cable and plug in ur tv,now ur tv picture,will be clear,completely.I do this many times to dicharge fuzzy CRT(picture tube).When i was a tv Tech.for the SONY TV Corporation.
This could be multiple things. If the fuzzy picture is on your regular cable channels and the tv is hooked up directly to the cable then it is a signal issue. Your cable signal is probably too low because it is either split too many times, a splitter went bad, a piece of cable went bad, you have RG-59 cable rather than the much better RG-6 cable. Another solution is if there is a vcr hooked up, the cable jack on the vcr could have gone bad, the vcr power could be on which will cause a fuzzy screen. If you have a vcr try to bypass it and hook directly to tv. If that fixes you problem then it may be the vcr or the wire from the vcr to the tv. If you have no vcr then I recommend buying a cable amplifier and hooking it up. This is a band-aid solution but it could work long term if it's just a matter of weak signal. If that does not fix your problem I would recommend calling a cable professional to evaluate your problem. Could be the line from the pole to your house or any of the wiring in your home.
If you have a good cable signal connected to the TV and it receives channel 50 nice and clear but all lower channels have nothing but snow, then the tuner is defective and needs to be replaced. This is quite an easy thing to correct. Sometimes resoldering all connections inside the tuner will bring it back to life, but in either case the set should be serviced by a qualified tech.
Sounds like you may have something generating interference, such as a bad cable shield on maybe a ground connection inside your tv. You might try moving the cables while watching the
screen and see if the pattern changes.
Double pictures on a screen can be caused by "ghosts", which means that you're getting two signals--- one slightly behind the other.
Anything oscillating generating a radio frequency may radiate into your circuits causing this strange problem.
Sounds like you've entered the "service mode" where you're seeing the chroma (color) signal only.
What type of connectors are the F and S? RCA? F?
This set is no longer made which makes it hard to research. By any chance, is there a small switch on the back that says "normal - service"?
Right, but the problem is more likely the tuner unit-which the coaxial is hooked up to. If it was strictly the coax, when you wiggled the cable around, the image would probably come back fine. Youll have to get a tuner and solder out the old one, the solder in the new one. The tuner for your model is part QAU0305-001 found here: http://www.jvcservice.com/service/JMdlPrtXrf.asp?PgReq=DspDta&MdlNbr=AV-32432
Be aware that the problem could be as simple as a diode or cap...until it can be tested we don't know for sure. techman would probably know more about this model than I would.