A-5066-637-A Sony BM5STY Main Board for XR-65A80L XR-65A80CL XR-55A80L XR-55A80CL

Sony A-5066-637-A (A5066637A) BM5STY main board for XR-65A80L, XR-65A80CL, XR-55A80L, and XR-55A80CL TVs. Board identifiers: 101227032 | A5066635A. Intended for diagnosed main-board faults that may cause startup, input, or audio problems. The listed substitute is A-5056-923-A; verify the exact identifiers and TV model before ordering.

Specifications & Board Identifiers

• Brand: Sony
• Part number: A-5066-637-A (A5066637A)
• Board identifiers: BM5STY | 101227032 | A5066635A
• Product type: Main Board
• Compatible models: XR-65A80L | XR-65A80CL | XR-55A80L | XR-55A80CL
• Listed substitute: A-5056-923-A (A5056923A)

Match the original board's white-sticker part number, board identifiers, full TV model suffix, and any version markings before ordering. No specific version code is provided in this listing.

Common TV Symptoms Fixed

When a main-board failure has been confirmed, replacement may address:

• TV fails to complete startup or repeatedly restarts.
• Inputs fail to respond or a connected source is not recognized.
• Audio or menu operation fails due to a main-board fault.

These symptoms can also originate in other components. Diagnose the fault before ordering; symptoms alone do not confirm that this board is the required repair.

Fitment & Ordering Guidelines

Verify the white-sticker part number A-5066-637-A, board identifiers BM5STY | 101227032 | A5066635A, full TV model suffix, and any version markings against your original board. A5066635A is listed as a board identifier, not as an additional substitute. Do not choose by screen size or board appearance alone.

The confirmed listed substitute is A-5056-923-A. Confirm its suitability for your exact TV before substitution.

Unplug the TV before service. Internal components can retain dangerous voltage; use a qualified technician. Use appropriate ESD protection, handle the board by its edges, and avoid forcing connectors.

Find XR-65A80L compatible parts.

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