Compaq PORTABLE 286 Maintenance And Service Manual page 79

NOTE: Controller and expansion board retaining screws may be located either
inside or outside the chassis.
To replace the fixed disk drive controller board, reverse Steps 1 through 3.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Ensure that the retainers on the bottom side of the board slots access plate
fit securely onto each board installed in your computer.
board of a different height, rotate the retainers to match the height of the
board. If the retainers are not rotated, serious internal damage may result!
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Video Display Controller Board Removal and Replacement
To remove the video display controller board:
1. Complete the Board Slots Access Plate Removal procedure (see Section 7.4).
2. Disconnect the fixed disk drive controller board signal cables, if
installed (Figure 7.9-2).
CAUTION
If you changed to a