I have a Sony CRT KV-29FX20K I try to repair. It worked perfectly fine before, however it started to change the picture into green hue for a long time. Sometimes it changed colors but changing it to green was probably the most common one. After that the picture started shutting off completely and the LED blinked 5 times. Sometimes the picture reappeared and disappeared and the LED blinks 5 times whenever the picture is off. Now it almost never works. I need to wait 20-30 minutes and the picture sometimes appears but disappears after a few seconds. The LED still blinks 5 times
I tried replacing the RGB transistors as suggested in other threads but unfortunately it didn't fix the issue. Symptoms are identical. Well, at least I didn't make it worse. I read somewhere this could be a power issue and this TV probably needs a full power supply recap. However, when I unscrewed the TV, there is no sign of leakage or bulging anywhere. There is nothing suspiciously obvious inside, just kinda dirty