I've had this receiver for about 10 years, and it stopped powering up suddenly a couple of days ago (no display, no stand-by light, nothing). There happened to have been a storm pass through a couple of hours prior, but it's done fine through many worse storms, and no other electical problems were assosiated with our storm two days ago. I've disconnected all speakers and otehr connections and tried plugging into a known good outlet while depressing the power button, checked the only fuse I could locate inside the unit near where the power cord enters for continuity with a multi-tester (checked good and looks fine), and checked for 110 volts where the power cord first connects inside the unit. Those few things I knew to check seemed normal. Any other things jump out at anybody as to the problem might be, what I can do as far as troubleshooting, etc.? Thanks, John

SOURCE: Kenwood KR V8080 receiver

if you sent 110v down the speaker wires & into the amp you most likely have damaged the audio outputs or the output ic. Look for a big aluminum heatsing & on one side you may find 1 or 2 ic's or numerous transistors, the ic's are hard to check, the transistors are easier to check, if transistors replace in pairs. also check for burnt /open resistors near outputs

SOURCE: no sound from front right and left speakers

you may have a dc condition present on speaker outputs. this could be caused by dry solder joints, suggest blanket resolder of the output stages for front channels.

SOURCE: I have an old Kenwood receiver that does not power up

If the voltage was 110, the polarity should not have made a difference. In all probability, the input power transformer has an open primary. This can happen with a power surge or just because of age. If you have an Ohmmeter, with the unit unplugged, measure across the 2 input pins for the main transformer. It should read about 3 ohms or less. If it reads infinity, it is open and must be replaced.

Keep us posted,
Dan

SOURCE: Kenwood VR-509 Receiver won't power up...

Check all your speaker wires for shorts, especially behind the amp, doesn't take much for something to throw a spanner in the works, like when cleaning house and moving stuff around.

SOURCE: receiver makes clicking sound before power shuts

What you are hearing is the speaker protection relays. See the link below for a generic explanation of protect mode (the mode your unit is in at the moment.) Update this if you have some test gear and wish to attempt to repair this.

Thanks,
Dan

Link: http://www.fixya.com/support/r5390728-protector_means