Apple 821-0056-A Video Harness Adapter PowerBook 520C 520 540 540C Flex Cable

Apple 821-0056-A Video Harness Adapter PowerBook 520C 520 540 540C Flex Cable

The Apple 821-0056-A is an OEM internal video harness flex cable adapter designed for the PowerBook 500 series laptops. It connects the display assembly to the logic board, routing the video signal through the laptop's hinge area via a flat flexible ribbon cable. The label printed on the cable body confirms Apple Computer, Inc. part numbers 821-0056-A and 632-0050-A with a 1993/94 date code.

Specifications & What's Included

• Manufacturer: Apple Computer, Inc.
• Primary Part Number: 821-0056-A
• Secondary Part Number: 632-0050-A
• Type: Internal video harness / flex ribbon cable adapter
• Compatible models: PowerBook 520C, 520, 540, 540C (500 series)
• Date code: 1993/94 (per printed label)
• Connector: Flat flex ribbon with white multi-pin board connector
• Includes: Video harness adapter only — no additional cables or accessories

Applications

The PowerBook 500 series launched in 1994 and represented Apple's premium consumer laptop line of the mid-1990s, featuring a passive or active-matrix color display, a trackpad (one of the first Apple laptops to include one), and a modular expansion bay. The video harness adapter routes display signals internally between the main logic board and the LCD panel assembly, passing through the display hinge. This part is sought today by collectors and technicians restoring or repairing PowerBook 520C, 540, and 540C machines, as original Apple OEM internal flex cables for these models are increasingly scarce. It is also compatible with the grayscale 520 model where the connector configuration matches.