Few days ago my UPC-200 got failure during night time and whole stereo set was off. When opened, I found exploded chip in input circuits of main board, and one resistor is burned away to. Please refer to attached pictures:
What could be the a reason for such failure? All other appliances are okay and I don’t think this was surge or an electrical spike in mains.
Can anyone provide me the the name of the chip that exploded? Is conventional hardware chip, or it should be programmed prior mounting into board? Input cable is PS Audio AC-12, may in be due to reversed connection “live wire - neutral wire” to wall receptacle?