Today I fixed my Parents’ RCA TV. It has a problem that a lot of RCA TVs have in this model line. The Horizontal Output Transistor goes out and the TV will not power on. Instead it just makes a high pitched sound and clicks (that is the flyback trying to start).
Here is the Horizontal Output Transistor. If it is bad, it will check shorted between all three pins (that’s 0 Ohms resistance). I got this part from a local parts supplier for around $9.
This is the high voltage board from the TV. Notice I said “HIGH VOLTAGE”, be very careful playing with this board, especially the capacitors (left in the picture) and the flyback (right in the picture). And of course you never want to work on the TV while plugged up to power.
The part we are after is attached to the big heat sink (the one at the bottom of the picture). It is easier to remove the solder from the three pins while the transistor is still attached to the heat sink. I use solder wick, but you could use a De-soldering pump. Wick is easier for me.
Here I have highlighted the three pins of the transistor that have to be de-soldered. You can also check the transistor here. If all three pins are not shorted to each other, your problem may be somewhere else.
Here is the disclaimer: this seems to be a temporarily permanent fix. I have replaced this transistor 3 times now, about once a year, so there is still something in there that is not playing nice with the Horizontal Output Transistor. But, $9 a year is still better than $1000 for a new TV, especially since this TV still has a very good picture.