IBM 6643 manual Computer exploded view Types 2179 and

2.Replace system board.

If you are unable to correct the problem, go to “Undetermined problems” on page 56.

Computer exploded view (Types 2179 and 6643)

I/O connectors and removal procedures are described on the following pages.

Note:

The number of defective pixels to qualify a TFT LCD panel to be replaced under warranty is 8 or more for all types 2179 and 6643 computers.

18Hardware Maintenance Manual