Compaq 621 Compaq 320, 321, 420, 421, 620, 621 Notebook PCs and HP 420, 620 No - Page 111

that secures the audio board to the base enclosure

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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 audio board from 39.6-cm (15.6-in) computers: 1. Position the computer right-side up with the front toward you. 2. Remove the Phillips PM2.0×3.0 screw (1) that secures the audio board to the base enclosure and then remove the audio board (2). Remove the audio board from 35.6-cm (14.0-in) and 33.8-cm (13.3-in) computers: 1. Release the latch (1) that secures the board to the base enclosure. Component replacement procedures 101

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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 audio board from
39.6-cm
(15.6-in) computers:
1.
Position the computer right-side up with the front toward you.
2.
Remove the Phillips PM2.0×3.0 screw
(1)
that secures the audio board to the base enclosure
and then remove the audio board
(2)
.
Remove the audio board from
35.6-cm
(14.0-in) and
33.8-cm
(13.3-in) computers:
1.
Release the latch
(1)
that secures the board to the base enclosure.
Component replacement procedures
101