Not likely! Suggest swapping input connection, red RCA connector to white and white to red and see if problem swaps speakers.
If still left channel bad swap speakers left to right see if problem follows speaker.
Check balance adjustment and confirm that it is set to the middle!
Check all other inputs and confirm always no left output.
The goal is to confirm that the left channel is defective!
The service manual is MS3102101 would normally be available from Radio Shack.
Check for defective capacitors or failed solder joints on the PC board. These units are repairable even by DIY however replacement recievers are relatively inexpensive.
Hope this helps?
go to link below and click the green "Notify Me" button when this item is stocked. We will inform you when we put one in stock. You must purchase a new OEM remote, universals will not work. OPTIMUS STA3750 3760 Remote Control
Switch off the mains supply before connecting/disconnecting any cables.
Disconnect all the speaker cables and switch on. If the fault clears carefully check the speaker wiring for shorts before reconnecting.
If the fault is not in the speaker wiring or speakers the amplifier will need expert attention. Faulty speaker wiring can easily damage solid state amplifiers.
