System Board - HP 5850 - Deskjet Color Inkjet Printer Reference Manual

System Board

1. Prepare the computer for disassembly
2. Remove the access panel
3. Remove all PCI and PCI Express expansion boards
4. Remove the fan shroud from the chassis
5. Rotate the drive cage to its upright position.
6. Rotate the power supply to its full upright position.
7. Disconnect all data and power cables from the system board.
8. Disconnect the serial port from the system board.
9. Disconnect the balance of the cables from the system board.
10. Remove the heatsink
11. Remove the six remaining silver T15 screws that secure the system board to the chassis (1).
12. Lift up the front of the system board (2), and then pull the system board forward, up, and out of the
chassis (3).
To install the system board, reverse the removal procedure.
NOTE: When replacing the system board, you must change the chassis serial number in the BIOS.
NOTE: The heatsink should be installed on the system board before the system board is reinstalled
in the chassis.
CAUTION:
the heatsink with an alcohol pad supplied in the spares kit. After the alcohol has evaporated, apply
thermal grease to the top of the processor from the syringe supplied in the spares kit.
(Computer Access Panel on page
(Heatsink on page
Before reinstalling the heatsink you must clean the top of the processor and the bottom of
(Preparation for Disassembly on page
114).
(Expansion Cards on page
(Inner Baffle on page
155).
108).
123).
151).
System Board 159