Keeping this old thread alive...
I dug up my old Infinity PS210 out of my closet, expecting it to still work, but lo and behold it has the same problem that everyone else has described. The scorching on the bottom of the circuit board is not nearly as bad as other peoples', but I'm sure those two transistors must have failed. Can anyone confirm that replacing those two transistors (and nothing else) has solved their problem? Also, my transistors seem to be MJE243 and MJE253, not the ones mentioned earlier. Should I stick with an exact replacement, or has anyone found ones that can handle increased heat?
Lastly, has anyone here poked open those holes and installed a chassis fan? It seems like once I get this thing back up and running, a 50mm case fan should fit nicely over the newly-created ventilation holes. If someone has done this, how did you power it, and do you have it running 24x7? I hear the heat issue happens even in standby (which mine was in 99% of the time).