HP Pavilion DV4-2155 Maintenance And Service Manual page 93

When replacing the system board, be sure that the following additional components are removed from the defective
system board and installed on the replacement system board:
■
Heat sink assembly (see
■
Processor (see
Remove the system board:
1. Turn the computer display-side up, with the right side toward you.
2. Disconnect the following cables from the system board:
1 Modem cable
2 Audio board cable
3 Fan cable
3. Disconnect the power connector cable.
Maintenance and Service Guide
"Heat sink assembly" on page
"Processor" on page 4-59)
Removal and replacement procedures
4-55)
4–51