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Ur tv the high voltage it dead,the FBT,the flyback transformer.The big black block of plastic with a red wire with a black cap that hook up to the CRT(tv tube) is dead.The FBT,flyback transformer needed it to be replaced to solved this problems.Call the shops,take estimates for the best deal to do the repair.This is one of the main part of the tv to put HV in CRT(tube tv).It pretty hard to find this FBT these day,because of the discontinue of making of Amalog tvs.
Ur high voltage FBT,is dead the block of plastic with a red wire with a cap hook to the CRT(tv tube).Might also have to replace the whole power board?Because just couple parts it hard to determins,what else also ready to burn next!
If its Dead Dead ,that mean no power is getting past the fuse :> then it needs a fuse
.30 vs 300.00-400.00
Ok there is a way of telling if its posibley
just a fuse . First no blinking lights ,good
no clicking sound from the set when you
try to turn it on .good
now unplug the set for about 30min
the plug it back in slowley if you
see and or hear sparks coming from
the plug , this is normal but bad news
for it being just a fuse , if you dont
see or hear a spark its likley just a
5-8 amp fuse blew inside the set. :>
WOW...had a high pitch noise, came and went...got worse as time wore on. Would shut off the set, times it cleared times it didn't. Warranty folks set out a TV repairman--said he had worked for RCA exclusively for years...anyway, explained that the 1k hertz noise was a known issue with the HD56W58 and that RCA’s published fix was "nail polish" applied on some board, had something to due with power and vibration...long story "presto" noise gone...but after 6 or so months we began to hear it again—say it ain’t so, but yes the high pitch was back. Same repairman, this time bigger problem...along with noise, the network card is broke and Fry’s Electronics (Irving, TX—hear that Corporate HQ at San Jose…your Irving store needs to be leased in and tote the company line...where's the customer satisfaction???) is balking at a “equal” replacement, they see it as take the less than equal product or get store credit…good luck & wish me luck with the equal replacement they tout when pushing the warranty.
the high pitch squeal indicates shorted component/s. the transformer goes hot co'z its being overloaded by the shorted component, it too could be the one creating the squeal!!
if you have experience with electronic troubleshooting, try to test some of the components particularly on the secondary part of the transformer. Be careful and make sure the TV set is unplugged. test for shorted diodes and transistors, if you're in doubt of your readings try to desoldering one leg of the diode then proceed with the testing/measuring. replace any of the bad components you find exactly with same part number or replacements with the same rating.
spend more time on it resoldering some other cold soldered components.
Sounds like the capacitor that goes bad just before the hIgh Voltage transformer goues bad. If i were you I would call an authorized RCA repair Shope and see if this is going to cause more damage to your set in the future.