Hello Mario
1: check connection properly.
2: test Speakers left and right on the channel that is working.
Do you have HDMI built in the AVR or not?
Some models does not have HDMI.
Try and give a feedback.
SOURCE: Onkyo Tx-SR55
did you swap the left from speaker with the left front?
if still crackels after that them you have bad left output.
SOURCE: Hum in Onkyo TX-SR505
Try to check the cables connectors maybe loose or cold solder this a common problem also,or buy a branded cables if it hum again.
Hope it may help you;
Regards;
VOTIT
SOURCE: I am looking for a code to allow my Onkyo TX-SR505
Magnavox is a sub brand of Philips. Try the Philips codes
SOURCE: one channel not working onkyo tx-sr04
You might have to take a look into the unit, there could be some damage or a bad solder connection on the front left speaker connector at the circuit board, possibly also on any other component (power amp chip / transistors, internal connectors, etc.), also loose or broken wires or oxydized connector contacts inside the unit.
It could be something else as well, but i guess it's worth checking the above mentioned.
Hope you can fix it
regards
3rq8 (Triarcuate)
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