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Re: hey good morning guys
Depending on the model # most of the time it is a bad flyback transformer . If it also has the high pitch squeal the horizontal transistor is bad as well . Just a clicking noise bad flyback. Some of the originals are not available and a generic is the only replacement. A repair shop may charge between $80 to $135 to repair so shop around . Ask them if there going to use a generic as they are cheap $20 to $30 . Good luck
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OK for the start, try this unplugged your unit for about 60 sec. Then plugged it again and switch on. Does it help?
If not then dont connect your surge protector in line for the meantime. Power the unit. This is to isolate whether your surge protector is defective or not. Does it help?
If not, this could down to your high voltage section, if this is a crt tube tv. You might loose your flyback transformer, and or the horizontal output transistor. Checking its peripheral component is a must. That clicking noise is the relay, thus this have relay?
I have the same problem-still troubleshooting...so far still not find the cause. DM1 power supply output voltages are operates correctly. Signal output of microprocessor up and down (no good) that turn on Q14105 and latch optical isolator U14102 to power the unit but both of ohmed out ok. it hard to troubleshoot the main board with power on.
Hey Jim, The high voltage protection circuit has gone out on the D-board and will need to be replaced. The fuse to the power supply is probably fine. A good repair tech shouldn't charge over $125 for this and it only takes a couple of hours. Let me know if I can be of further assistance.
What you are hearing is the high voltage arcing a bit. This is often caused by dust buildup on the high voltage components, & is not harmful. A good cleaning with compressed air will cure it, but this is not a do it yourself job, because dangerous voltages are present inside any TV.
Sounds like you have a shorted horizontal out put transistor and bad flyback transformer.
This is a common problem in the newer RCA's.
I've had serveral of them do this.
The noise that you hear is the power supply
telling you that it's overloaded.