Sony 5.1 A/V receiver model:STR-DE345,year:Jan 2000.No power I found Q704=MP1620-OPY-M=Sony # 8-749-010-26=2SB1620=PNP=to be shorted base to collector (I think) and found F901=3 amp fuse to be open. Well I decided to remove Q704 and power up the unit with a 100 watt bulb in place of F901 so when I powered up the unit I noticed I noticed that the bulb lit bright for about 3 seconds then dimmed down,I did this to see if there were any other problems before I ordered Q704.Now when the new Q704 finally arrived I put it in and everything works great in the stereo except it has no display. I measured the voltages at the both front faceplate (display board) connectors and they seem to correspond to the voltages stamped on the board so my assumption is that IC103=UPD780206GF=100 pin quad SMT display driver IC is defective,I hope not. Did I burn IC103? if not anyone have any common repair tips for no display?.Thanks in advance.
Sidney Dartmouth,Nova Scotia Canada