Optimus Audio Players & Recorders - Recent Questions, Troubleshooting & Support

  1. Verify the Unit Isn't in Protect Mode.
  2. Check the Fuses.
  3. Check the Pigtail Connector.
  4. Check for Power at the Head Unit.
  5. Check for Ground at the Head Unit.
  6. Bench Test the Head Unit and Replace if Needed.

Optimus Audio... • Answered on Apr 18, 2021

The manual might have the code to adjust the display screen optimus sta-3500 manual on google and on the companies official website too.Or call or email customer service then.

Optimus STA-3500... • Answered on Apr 01, 2021


Optimus Audio... • Answered on Sep 29, 2018

I found the plastic button plunger on the front becomes too short to actuate the tiny on/off switch inside. Remove the cover and insert a piece or two of thickish paper (like file-folder thickness) between the plastic plunger and the switch. Let it hang back over the circuit board so it will stay in place.

Optimus Audio... • Answered on May 22, 2018

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