I have an onkyo tx-8211. I was cranking it at a party with a laptop on top of it. I noticed it was getting pretty warm, but didn't take enough action. Suddenly, the sound /nearly/ cut out, and it's been like that since. Not no sound, but only low and tinny sound. FM radio seems to come through better than CD player, but still no bass. Tape 2 button is off I've tried one speaker at a time to rule out a short I've never seen it say "protect" any ideas?

SOURCE: Onkyo receiver playing in mono only

sounds like a reception problem. Is there a visual meter for the reception? Check your antenna.

SOURCE: PROTECT Mode issue

Well let us start here ok one of my speakers blew the woofer blew out on my infinity speaker on the right side. Your amp will protect itself from being overloaded on one side of the power amp. This is what happened to me. So you should check your connections also this may also pose a problem. Make sure your speakers got 4 ohm or 8 ohm speakers switch dialed correctly on the rear of your power amp. check your ohm rating on your speakers also with a volt meter on your ohm setting which is very important which can damage your power amp if it is set wrong. You all have a great holliday season hope this helps.

SOURCE: Sound cutting out

sounds like the tape monitor may be turned on. First place to check anyways. If it is not the problem, I am happy to talk more about it with you and do some more diagnoses.

regards
Graeme

SOURCE: Sony PS-LX200H turntable plugged in to Onkyo TX-8211 inputs

After a few years it may be time to consider a new cartridge for the turntable. The current one may have given up the ghost. You might also want to check that the output cables from the turntable to the receiver are firmly plugged in. They may have come loose if someone was moving things or cleaning. Yet another thing to consider is the input on the receiver may not be working. You can test this by plugging in a cable with RCA plugs on both ends and touching the pins on the unconnected end. If the input's okay you'll hear a hum.

Probably it's time for a new cartridge. They don't last forever, especially if you, like me, are someone who still plays a lot of old vinyl!

Please take a moment to rate this solution a fixya if it's helped get you going, and thanks for asking here!

SOURCE: Onkyo TX-8211 receiver with very low volume through speakers

It's the Tape 2 button - unclick it.