HP EliteDesk 800 G5 Maintenance and Service Guide - Page 74

then align the board with the chassis screw holes., When replacing the system board

Page 74 highlights

8. Slide the system board toward the front of the computer to disengage the I/O panel (1), then lift the rear of the system board upward (2), and then pull it out of the computer (3). When reinstalling the system board, first insert the I/O panel back into the slots in the rear of the chassis, and then align the board with the chassis screw holes. NOTE: When replacing the system board, you must change the chassis serial number in the BIOS. 64 Chapter 4 Removal and replacement procedures

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8.
Slide the system board toward the front of the computer to disengage the I/O panel
(1)
, then lift the rear
of the system board upward
(2)
, and then pull it out of the computer
(3)
.
When reinstalling the system board, first insert the I/O panel back into the slots in the rear of the chassis, and
then align the board with the chassis screw holes.
NOTE:
When replacing the system board, you must change the chassis serial number in the BIOS.
64
Chapter 4
Removal and replacement procedures