I have a tr-626 which will power on, the red LED lights up on low
 level, but nothing else. No display, no sound(exept 60hz hum when
 turned all the way up). I've visually inspected the circuit board for
 broken traces and bad components, but everything seems to be in good
 shape. Any thoughts or suggestions would be appreciated.
 thanks,
 Ron S.
http://www.anoderecords.com/