EAY65689421 LG OLED 77-inch TV Power Supply Board

EAY65689421 LG OLED TV Power Supply Board is a genuine OEM replacement for the listed 77-inch LG models OLED77A1AUA, OLED77A2PUA, OLED77B2AUA, OLED77B2PUA, and OLED77B3PUA. Board identifier: EAX68999801(1.8). Listed version codes: BUSWLJR, DUSQLJR, CUSQLJR. A faulty power supply can cause no power, unexpected shutdowns, or a dark screen. Match your original board identifiers and TV version before ordering.

Specifications & Board Identifiers

• Part Number: EAY65689421
• PBA / Board Numbers: EAX68999801(1.8)
• Compatible Models: OLED77A1AUA, OLED77A2PUA, OLED77B2AUA, OLED77B2PUA, OLED77B3PUA
• Listed Version Codes: BUSWLJR | DUSQLJR | CUSQLJR. Verify the complete model suffix and version on your TV label and the white-sticker part number on your original board. Model-to-version pairings are not specified in this listing.
• Product Type: OLED TV Power Supply Board

Common TV Symptoms Fixed

• No Power / Dead Set: TV does not respond to the remote or power button when a power-supply fault is the cause.
• Unexpected Shutdown: TV powers on and then shuts down due to a diagnosed power-supply fault.
• Dark Screen / No Picture: A power-supply fault may prevent the OLED panel from operating. OLED TVs do not use a separate backlight.
• Blinking Standby Light: May accompany a power fault; diagnose the cause before replacing the board.

Fitment & Ordering Guidelines

• Match the white-sticker part number EAY65689421 and PCB identifier EAX68999801(1.8) to your original board.
• Verify your full TV model suffix and version code. A matching model name alone does not establish compatibility.
• Unplug the TV before servicing. Power-supply capacitors can retain dangerous voltage; installation by a qualified technician is recommended. Observe ESD precautions when handling the board.

OLED77A1AUA compatible parts

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