Thanks for your response.
>>>> Visually, I see a fuse by the input connector (brown cylindrical thing).
The Fuse (F101) is OK.
>>>>> Check the p/n of the transistor on the heat sink and try to check the transistor/FET.
transistor? The one atached to heatsink is IC101 and has 6pins.
>>>>>A possible diode looks popped near the end of the heat sink.
The three diodes close to IC101 (attached to the Heatsink) are all good. I'm not sure which diode your are referring to that looks popped up. If you are referring to BD101 (also close to IC101, in between ZD101 and ZD102), it does not seem to be a diode (symbol looks like an inductor, not the anode and cathode) but seems to be OK as there is continuity.
I just noticed that there is a continuous soft clicking sound close to the power input when the power cable is plugged in. Seems like coming from C101 or C102.
I also did not get any reading of 3.3V on CN3 where the power switch is connected
What do you think?