I have a Samsung HLN4365W1X/XAA, I replaced the lamp about 6 months ago, but now the screen is black, and I get a high pitched sound. The only way to stop the sound is to unplug the set. Remote or the power switch will not turn the set off, has to be unpluged. This is my first time asking questions, please let me know what can cause this problem and if it is something I can fix as I did with the lamp. Thanks jpetef
In this set, I have seen the power supply board, the main board and the ballist transformer cause this problem. You would be better off to call in an authorized Samsung repair center, as they should be able to track the fault down to the correct part. You could start replaceing parts, but that would be a very expensive thing to do. Good Luck, and let us know how you made out with this repair.