Disconnect all the speaker wires at the receiver and turn it back on. If itdoesn't go into protect mode, your receiver is ok.
Reconnect
the speakers one at a time being sure to turn the receiver off each time you connect a speaker and turn the receiver on until your receiver goes into protection mode again.
When it goes into protect mode again, the last speaker you connected has a problem. Trace the speaker's wire
to the speaker looking for cuts or shorts along the way.
If you have a multimeter, switch itto ohms and check the speaker for a dead short, if you show a dead short you have a blownspeaker. Hope this helps.
--Matt
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