BN44-01329A (BN4401329A) Samsung Power Supply Board

The BN44-01329A (BN4401329A) is a Samsung OEM Power Supply Board compatible with the QN77S90DAFXZA and QN77S90FDFXZA. Board number L77QA9N_FVD. Replaces a failed power supply causing no power, black screen, or intermittent shutdowns on version FA02 units.

Specifications & Board Identifiers

• Part Number: BN44-01329A (BN4401329A)
• PBA / Board Numbers: L77QA9N_FVD
• Compatible Models: QN77S90DAFXZA, QN77S90FDFXZA
• Supported Version: FA02 — check white sticker on original board to confirm
• Product Type: Power Supply Board

Common TV Symptoms Fixed

• No Picture / Black Screen: TV powers on but display remains dark or backlight fails to activate.
• Power Issues: TV won't turn on, cycles on/off repeatedly, or shuts down unexpectedly.
• Audio / Input Failure: Sound cuts out or inputs stop responding alongside power instability.
• Smart Hub / Wi-Fi Errors: Smart features become unresponsive due to unstable power delivery to the mainboard.

Fitment & Ordering Guidelines

• Verify the white sticker part number and PCB number on your original board match before ordering.
• Confirm your TV model suffix and version code match FA02.
• Basic electronics experience recommended for installation.
• Looking for a substitute part? Try BN44-01264A
• Looking for other parts for this TV? Search QN77S90DAFXZA compatible parts

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We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.