I managed to grab the part number as I caught the chip in the right light angle. It is a 6N18218 (ICM802S on the silk screen). For clarity, the two MOPSFETS that went short circuit across all legs were QM804S and QM803S on the silk screen.

Post body:

Hi all,

I'm working on my Samsung QE65Q9FN (65" Q9FN QLED, European model) with relay clicking and no picture. The power supply board in the display itself is the BN44-00944A, known on the board itself as the 65A board (silk-screened designation). There is also a second board, the 65B, which looks identical but is only partly populated for the LED power.

Symptom: Continuous relay clicking on the one connect — TV will not start up, no picture. However the standby LED is on constantly — so the standby supply rail appears to be alive and the...