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James Hudson MDJul 30, 2025
What to do if my Optimus Concertmate 980 Electronic Keyboard has no sound?
- SSteven LarsenJul 30, 2025
If your Optimus Electronic Keyboard has no sound, even when keys are pressed, there could be several reasons. First, ensure the keyboard hasn't turned off automatically by setting the POWER/MODE switch to OFF and then back to ON. Check that the volume isn't turned down; repeatedly press the MAIN VOLUME button to increase it. Also, disconnect any headphones that may be connected. Verify the power supply: ensure batteries are correctly oriented and fresh, or check the AC/DC adapter connection. If the POWER/MODE is set to FINGERED, switch it to NORMAL or CONCERT CHORD, or press 3 or 4 keys to form a chord.
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