I see an unusual light pattern on my JBL LSR 4300 speakers: the input button...

I see an unusual light pattern on my JBL LSR 4300 speakers: the input button is blinking and the first meter LED is flashing to show a muted state. What does this mean?

This light pattern indicates an error. You can look up these errors in Appendix F of the LSR User's Manual.

This particular error is Sync Signal Error, which is caused when no digital signal is found or when the sync signal from the S/PDIF or AES/EBU digital input is lost.

To remedy this, confirm that the digital sync signal is properly connected.

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