Compaq 400 486 DX2/40 MHZ 250 MB 4 MB 9.5, 400C 486 DX2/40 MHZ 250 MB 4 MB 9.5, 400CX 486 DX2/40 MHZ 250 MB 4 MB 8.4, 410 486 DX2/50 MHZ 250 MB 4 MB 9.5, 410C 486 DX2/50 MHZ 250 MB 4 MB 9.5, 410C 486 DX2/50 MHZ 350 MB 4 MB 9.5, 410CX 486 DX2/50 MHZ 350 MB 4 MB 8.4, 420C 486 DX4/75 MHZ 350 MB 4 MB 10.4, 420C 486 DX4/75 MHZ 420 MB 8 MB 10.4, 420CX 486 DX4/75 MHZ 420 MB 8 MB 10.4, 430C 486 DX4/100 MHZ 420 MB 8 MB 10.4, 430C 486 DX4/100 MHZ 720 MB 8 MB 10.4, 430CX 486 DX4/100 MHZ 720 MB 8 MB 10.4 108

19.To replace the system board, reverse the previous steps.

To replace the System Board, follow these steps:

IMPORTANT: When installing a new system board, make sure that the insulator is placed between the system board and the diskette drive. The gasket over the Keyboard connector must be tucked under the Chassis.

IMPORTANT: When replacing the system board, the screws must be replaced as follows:

1.Replace the two alignment screws on the rear of the system unit module to align the system board (Figure 3-57).