LG EAY65689421 Power Supply Board

The EAY65689421 (EAY65689421) is a genuine OEM LG OLED TV Power Supply Board compatible with 77" LG OLED models including OLED77A1AUA, OLED77A2PUA, OLED77B2AUA, OLED77B2PUA, and OLED77B3PUA. Board number: EAX68999801(1.8). Fixes symptoms like no power, unexpected shutdowns, no backlight, or blinking standby light. Version code required — check the white sticker on your original board before ordering.

Specifications & Board Identifiers

• Part Number: EAY65689421 (EAY65689421)
• PBA / Board Numbers: EAX68999801(1.8)
• Compatible Models: OLED77A1AUA, OLED77A2PUA, OLED77B2AUA, OLED77B2PUA, OLED77B3PUA
• Supported Version: BUSWLJR, DUSQLJR, CUSQLJR — check white sticker on original board
• Product Type: OLED TV Power Supply Board

Common TV Symptoms Fixed

• No Power / Dead Set: TV will not turn on at all — no response from remote or power button
• Unexpected Shutdown: TV powers on but shuts off by itself shortly after startup
• No Backlight / Black Screen: Audio present but screen remains dark with no picture
• Blinking Standby Light: Standby LED blinks repeatedly indicating a power fault condition

Fitment & Ordering Guidelines

• Verify the part number and PCB number on the white sticker of your original board match exactly
• Confirm your TV model suffix and version code match one of the listed compatible combinations above
• Basic electronics experience recommended — observe proper ESD/static precautions during installation

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