I have a Pioneer Receiver VSX-D457 that's about 10 years old, and for which the manual is long gone. As of yesterday, after turning it on, the display blinks "POWEROFF" for a few seconds and the receiver returns to standby. No combination of unplugging, onboard or remote controls I've tried returns the unit to normal operation.
Any suggestions for a fix? I was contemplating a low-end home theater to replace my mishmash of aging components, but didn't want to do it in desperation.
ETA: It's powering a pair of KLH bookshelf speakers that are about 18 years old, and I have had fairly frequent overloads. disconnected speakers and powered on with no change.