BN44-01121A Samsung Power Supply Board QN75LS03AAFXZA CA01

BN44-01121A Samsung Power Supply Board (BN4401121A) is compatible with Samsung QN75LS03AAFXZA version CA01. This LED TV power board may help resolve no-power, startup, shutdown, or power-cycling symptoms when the original board has been correctly diagnosed as faulty.

Specifications & Board Identifiers

• Part number: BN44-01121A (BN4401121A)
• Board number: BN44-01121A
• Compatible model: QN75LS03AAFXZA
• Supported version: CA01
• Product type: LED TV Power Supply Board

Version warning: Match CA01 and the white-sticker identifiers on your original board before ordering.

Common TV Symptoms Fixed

• TV will not power on
• TV turns on and then shuts down
• Intermittent startup or repeated power cycling
• No backlight or unstable power to internal components

These symptoms can have more than one cause. Confirm the power-supply board is faulty before ordering.

Fitment & Ordering Guidelines

Verify the white-sticker part number BN44-01121A, PCB/board number, complete model suffix QN75LS03AAFXZA, and version CA01. Model number alone is not enough to guarantee fitment. Compare the board layout and connector positions with your original part. Disconnect the TV from power, allow stored voltage to discharge, and use ESD-safe handling. Power-supply boards can retain dangerous voltage; professional installation is recommended.

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