So I just opened up my power supply. There is a fuse soldered in line on the board, and it has continuity across it. All of the other components look ok as far as I can tell (no blown caps or melty spots on the IC).
If I plug the power cord, one of the transistors gets really hot quite fast. It is Q1 on the board, and the part is E13009L. Looking up the data sheet, it’s a high voltage switching transistor ( http://html.alldatasheet.com/html-pdf/53466/FAIRCHILD/E13009L/406/1/E13009L.html ). There is a second transitor right beside it in the Q4 spot, which is also a E13009L. (They are the larger ones on the right side in the picture).
If I compare the two, the Q1 transistor measures in the neighborhood of 550 ohms between base/collector and collector/emitter, and is open between base/emitter. The orientation of the leads matter, just like that of a diode. These numbers are what I am kind of expecting.
The Q4 one however has a about 30 ohms resistance between the base and collector pin and 30 between the collector and emitter pin, and <1 ohm between base and emitter pin. It does not matter what orientation the leads are in, these measurements are the same. This one was not getting hot, but I imagine that it is defective.
Mind you I am taking these measurements while the parts are still soldered to the board, so I might not be actually measuring these components, but in the past, I can usually tell which one is the bad one by seeing which one is not like the others, or which one is shorted.
I have found some available on eBay, but maybe someone has had a similar issue and can chime in?