ONN M23115-MT / 515C90104M12 Main Board for 100012585

ONN M23115-MT / 515C90104M12 Main Board

Location: 00i5

This replacement main board is compatible with ONN TVs using model number 100012585. It controls video processing, input/output switching, audio output, and system logic — essential for TVs that power on but produce no picture, show signal issues, or otherwise fail to function correctly.

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Part & Board Numbers

• Part Number: M23115-MT
• Manufacturer Board Number: 515C90104M12
• Other / Variant Board IDs (as labeled on board):
  • MT90104-ZC01-01
  • “M12” or similar revision code

Important: Always confirm your board’s part number exactly from the sticker or silkscreen before ordering. Matching solely by TV model can result in incompatibility.

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Compatible TV Model

• ONN 100012585

While this board is specified for the model above, other sets using the same board configuration may also be compatible — always verify the board number first.

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Common Failure Symptoms a Defective Main Board May Cause

• TV powers on but screen remains blank or black
• No input detection or signal, even when cables and source are confirmed good
• Freezing, reboot loops, or complete failure to boot
• No audio output or distorted audio with valid input
• Loss of menu, settings, or smart-TV functionality (if applicable)

These symptoms can also stem from other failing components (power supply, T-Con board, panel, etc.), so proper troubleshooting is recommended before replacing the main board.

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Installation & Handling Guidelines

• Power off and unplug the TV, then wait several minutes to allow capacitors to discharge before starting any repair.
• Use anti-static (ESD-safe) precautions when handling circuit boards or internal components.
• Ensure all ribbon cables, harnesses, and connectors are properly aligned and fully seated when reinstalling.
• Avoid bending the board or forcing connectors; gentle handling and correct alignment are crucial.

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Condition & Testing

• Professionally tested and verified to be fully functional.
• Guaranteed as a working replacement for the listed part and board numbers when installed correctly.

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Warranty & Return Terms

• Warranty: 180-Day Warranty.
• Returns accepted for boards that are unmodified, undamaged, and properly installed.
• We recommend holding onto your original board until you confirm successful repair.

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Shipping Information

• Ships from Brighton, TN (standard warehouse location).
• Secure packaging to protect the board during transit.
• Expedited shipping available at checkout if selected.

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If you are unsure whether this board is the correct replacement for your TV — or need help verifying compatibility — please contact us prior to ordering. We’re happy to assist in confirming your board number and model version.