Removing The Motherboard Or Bottom Case (Hp Authorized Service Providers Only) - HP DesignJet 500 Service Manual

Removing the Motherboard or Bottom Case
(HP Authorized Service Providers Only)
Required Equipment
#0 Phillips screwdriver.
Removal Procedure
Note: Before Replacing the Motherboard
If possible, record the computer's electronic serial number before you replace the motherboard.
You will then store the electronic serial number in the EEPROM on the new motherboard using
the Service Utility floppy disk.
1. Download the Omnibook 500 service package from the Partnership web site (see page vi),
and create a Service Utilities floppy disk as described in the package's Readme file.
2. Connect a floppy disk drive to the computer using a USB floppy cable, or dock the computer
and insert a floppy drive module into the expansion base.
3. Connect an external monitor to the computer, so you can verify the boot process.
4. Plug in an AC adapter.
5. Insert the Service Utilities floppy disk in the floppy drive.
6. Turn on the computer. When the HP logo appears (on either the built-in display or the external
monitor), press ESC to display the boot menu, then boot from the floppy disk.
7. Select the Serial Number option from the boot menu.
8. When prompted, type A for the automatic update option. This stores the current system data
from the old motherboard on the floppy disk.
1. Unplug the AC adapter, if present, and remove the battery.
2. Remove these additional assemblies:
Hard disk drive (page 2-6).
Power button panel (page 2-9).
Keyboard (page 2-10).
System SDRAM module (page 2-12).
Expansion SDRAM module, if present (page 2-13).
Switchboard PCA (page 2-15).
Display assembly (page 2-18).
Heatsink/fan (page 2-21).
Top case (page 2-23).
3. Remove all three screws from the audio/PC Card panel. Flip out the PC Card eject button, so that
it stands out from the side of the unit, then remove the panel.
HP Omnibook 500 Removal and Replacement 2-25