Apple 821-0027-A 632-0016-A Inverter Cable PowerBook 520 520c 540 540c FPC

Apple 821-0027-A 632-0016-A Inverter Cable PowerBook 520 520c 540 540c FPC

This is a genuine OEM Apple flexible ribbon cable for the PowerBook 500 series, part number 821-0027-A (also labeled 632-0016-A). It serves as the inverter cable connecting the display inverter board to the main logic board, providing the signal path needed to drive the backlight in the PowerBook's passive-matrix or active-matrix LCD panel. The cable is printed and dated copyright 1993–94 by Apple Computer, Inc., consistent with the PowerBook 520/540 production era.

Specifications & What's Included

• Manufacturer: Apple Computer, Inc.
• Part Number: 821-0027-A
• Secondary Part Number: 632-0016-A
• Type: Flexible Printed Circuit (FPC) inverter ribbon cable
• Cable shape: L-shaped flexible flat cable
• Connectors: Dual ZIF (zero insertion force) flat connectors, one at each end
• Compatible models: Apple PowerBook 520, 520c, 540, 540c
• Copyright date on label: 1993, 1994
• Cable only — no other accessories included

Applications

The Apple PowerBook 500 series was introduced in 1994 and represented a significant leap forward in Apple's portable line, featuring built-in trackpad (the first on a mainstream laptop), stereo speakers, and an ethernet option. The 520 used a 25 MHz 68LC040 processor while the 540 used the full 68040 at 33 MHz; the "c" suffix models added active-matrix color displays. This inverter cable is a critical internal component for anyone restoring or repairing a PowerBook 520 or 540 — backlight failure or display issues in these machines are often traced to cracked or damaged flexible cables like this one. Genuine OEM replacement parts for the PowerBook 500 series are increasingly scarce, making this a valuable find for collectors and repair technicians maintaining these classic early-1990s Apple portables.