Compaq Portable 286 Compaq Portable Computer, Compaq Plus Personal Computer, a - Page 84

System Board and Memory Option Removal and Replacement

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To replace the expansion board, reverse Steps 1 through 4. NOTE: Ensure that the retainers on the bottom side of the board slots access plate fit securely onto each board installed in the computer. If you changed to a board of a different height, rotate the retainers to match the height of the board. Chapter 7.10 System Board and Memory Option Removal and Replacement Removal and replacement procedures for both the system board and associated COMPAQ memory options (including ROMs) are included in this section. Although it is possible to remove and replace memory options in a COMPAQ Portable and COMPAQ PLUS Personal Computer without removing the system board, it is not recommended because of the limited amount of space inside the chassis. Removing the system board allows close examination of memory chips. System Board Removal and Replacement To remove the system board: 1. Complete removal procedures for all installed controller and expansion boards (see Section 7.9). 2. Remove the bottom access cover (see Section 7.3). 3. If you are removing a COMPAQ PORTABLE 286 system board, disconnect the security lock switch connector and storage device power cables (see Sections 7.11 and 7.14). 4. Remove the following system board connectors: o Keyboard connector o System power connector

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To replace the expansion board, reverse Steps 1 through 4.
NOTE: Ensure that the retainers on the bottom side of the board slots access
plate fit securely onto each board installed in the computer. If you changed
to a board of a different height, rotate the retainers to match the height of
the board.
Chapter 7.10 System Board and Memory Option Removal and Replacement
Removal and replacement procedures for both the system board and associated
COMPAQ memory options (including ROMs) are included in this section.
Although it is possible to remove and replace memory options in a COMPAQ
Portable and COMPAQ PLUS Personal Computer without removing the system board,
it is not recommended because of the limited amount of space inside the
chassis. Removing the system board allows close examination of memory chips.
System Board Removal and Replacement
To remove the system board:
1. Complete removal procedures for all installed controller and expansion
boards (see Section 7.9).
2. Remove the bottom access cover (see Section 7.3).
3. If you are removing a COMPAQ PORTABLE 286 system board, disconnect the
security lock switch connector and storage device power cables (see
Sections 7.11 and 7.14).
4. Remove the following system board connectors:
o Keyboard connector
o System power connector