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If this RCA TV has a Chassis number of ITC222 then you need to call a tech to swap out the deflection circuit board for a new or rebuilt board. This RCA Chassis is a TV Techs worst nightmare to repair.
the itc222 has a processor that shut it down for one or 20 different reasons. generally it is for high voltage safety reasons. the first thing as a technician i check are the horizontal tansistor and flyback. The first thing you can do is unplug for hour and then try again. This usally dosent work but it does elimate proscesor lockup. since the light comes on then you can elemante the main fuse. as a technician we have acess to computer equipment much like the one on cars that read error codes that tells me why the set shut down. does the set try three times then shut down.or just shutdown with one try.
Same thing here....RCA tells me to count the times the light flashes as it apparently is set to "tell" you what the problem is.......3 to 5 flashes means your lamp is messed up.....they are over $300 to replace!
chirrping.....is indication of shutdown issue first thing to chech is make sure that the flat ribbion cables foint from the green board over to the power board are in place...this set shuts down for many reasons.. the most likely in your case would probalbkly be a blown horizontal output transistor. which could also mean a blown flyback transformer. a technician can replace these ..typical repair cost is about 100 to 300 dollars.
OK first thing.. its not the fuses. if the green light flashes this is an idication that the processor is receiving power, This is a shutdown unit,, If the set has any problems .. i think thers about 25 different reason the set will shut down. for safety Technicians have special computer equipment to read errors from the processor. COmmon sollutions include first shut set down and uplug for about 30 min then try again..( i dont think i have ever seen this work) THis is where the troubleshooting begins. Problems on this unit start with shorted horizontal transistors. that the first thing techs check.