This receiver had a similar problem over 6 months ago and was "repaired" by a local tech. Please note that here in Brazil it's very difficult to locate somebody competent to work on these vintage units, and I'm not sure the guy I found is one of them. At that time, he merely replaced a couple of caps on the power supply board. Due to travel, I only used the receiver a couple of times since them. The other day it again wouldn't power up. Something that strikes me as curious is the fact that when the unit is plugged into the wall socket (but without the front panel power switch activated) , I get voltage at both rear AC outlets (127VAC at the "Unswitched" one and 122VAC at the "Switched" one). Might this indicate some kind of problem with the front panel power switch? Shouldn't I be measuring 0VAC at the "Switched" rear outlet?