Disconnect all speakers, turn it on. If it stays on, connect one pair of speakers at a time and when it shuts off, that speaker is the problem. There may be a short in the wire or the speaker may be bad. If you get that far, try connecting the bad speaker with another speakers wires.
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Disconnect all speakers, turn it on. If it stays on, connect one pair of speakers at a time and when it shuts off, that speaker is the problem. There may be a short in the wire or the speaker may be bad. If you get that far, try connecting the bad speaker with another speakers wires.