Compaq 321 Compaq 320, 321, 420, 421, 620, 621 Notebook PCs and HP 420, 620 No - Page 106

Main battery connector, Remove the keyboard see

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7. Slide the system board (5) out of the base enclosure. Reverse this procedure to install the system board. Main battery connector The main battery cable is included in Cable Kit 605795-001. Before removing the main battery cable, 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 49). 5. Remove the service door (see Service door on page 49). 6. Remove the hard drive (see Hard drive on page 52). 7. Remove the optical drive (see Optical drive on page 58). 8. Remove the fan (see Fan on page 60). 9. Remove the palm rest (see Palm rest on page 64). 10. Remove the keyboard (see Keyboard on page 69). 11. Remove the top cover (see Top cover on page 73). 12. Remove the system board (seeSystem board on page 92). Remove the main battery cable: 1. Remove the two Phillips PM2.5×4.0 screws (1) that secure the connector to the base enclosure. 96 Chapter 4 Removal and replacement procedures

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7.
Slide the system board
(5)
out of the base enclosure.
Reverse this procedure to install the system board.
Main battery connector
The main battery cable is included in Cable Kit 605795-001.
Before removing the main battery cable, 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
49
).
5.
Remove the service door (see
Service door
on page
49
).
6.
Remove the hard drive (see
Hard drive
on page
52
).
7.
Remove the optical drive (see
Optical drive
on page
58
).
8.
Remove the fan (see
Fan
on page
60
).
9.
Remove the palm rest (see
Palm rest
on page
64
).
10.
Remove the keyboard (see
Keyboard
on page
69
).
11.
Remove the top cover (see
Top cover
on page
73
).
12.
Remove the system board (see
System board
on page
92
).
Remove the main battery cable:
1.
Remove the two Phillips PM2.5×4.0 screws
(1)
that secure the connector to the base enclosure.
96
Chapter 4
Removal and replacement procedures