AVR-487 won't power up, "standby" light flashes

Pull the top on the receiver; it's usually 7 or 8 small phillips screws. Once you pull the top, look where the AC cord enters the unit. (make sure it's unplugged) and there should be one or two fuses. If they are coated fuses, you need a meter to tell you if they are good or bad. Put a meter on resistance/tone and your probes on either side of the fuse, if you hear a tone, the fuse is good, if you don't touch the two probes together to test your tone and check again, if still no tone, you have a bad fuse. You should be able to get a replacement at Radio Shack or any Electronics Parts store. If your fuses are good, you've got a service issue and it needs to go out for repair. Hope this helps