Before removing the system board, follow these steps:
1.
Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2.
Disconnect all external devices connected to the computer.
3.
Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4.
Remove the battery (see
Battery on page 39
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 40
)
b.
Optical drive (see
Optical drive on page 46
)
c.
Keyboard (see
Keyboard on page 50
)
d.
Switch cover (see
Switch cover on page 48
)
e.
Speaker (see
Speaker on page 53
)
f.
Display lid switch module (see
Display lid switch module on page 54
)
g.
Display assembly (see
Display assembly on page 55
)
h.
Top cover (see
Top cover on page 60
)
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 module (see
Memory module on page 45
)
●
WLAN module (see
WLAN module on page 42
)
●
Processor (see
Processor on page 74
)
●
ExpressCard assembly (see
ExpressCard assembly on page 79
)
Remove the system board:
1.
Remove the RJ-11 jack
(1)
from the clip built into the base enclosure and remove the RJ-11 jack
cable from the hook
(2)
built into the base enclosure.
Component replacement procedures
67
Summary of Contents for 550 - Notebook PC
Page 1: ...HP 550 Notebook PC Maintenance and Service Guide ...
Page 4: ...iv Safety warning notice ...
Page 23: ...Computer major components Computer major components 15 ...
Page 127: ...8 Backup and recovery 119 ...
Page 150: ......
