HP Compaq Presario,Presario C770 Maintenance And Service Manual page 81

When replacing the system board, be sure that the following components are removed from the defective
system board and installed on the replacement system board:
Memory modules (see
●
WLAN module (see
●
RTC battery (see RTC battery on page
●
● Card reader board (see
Heat sink (see Heat sink on page
●
Processor (see Processor on page
●
Power connector cable (see
●
Remove the system board:
Remove the power connector (1) from the clip built into the base enclosure.
1.
Remove the power connector cable (2) from the routing channel and clips built into the base
2.
enclosure.
Remove the black Phillips PM2.5×4.0 screw (3) that secures the system board to the base enclosure.
3.
Disconnect the USB board cable (4) from the system board.
4.
Flex the front edge of the base enclosure (1) outward to provide clearance for the audio
5.
connectors (2).
Use the optical drive connector (3) to lift the right side of the system board (4) until it rests at an
6.
angle.
Memory module on page
WLAN module on page
75)
Card reader board on page
79)
81)
Power connector cable on page
43)
45)
77)
83)
Component replacement procedures 73