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HP Compaq dc7900 Small Form Factor Business Product End-Of-Life Disassembly Instructions page 2

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1.3 Markings for plastic parts greater than 25 grams
Plastic Part Name
Main bezel
Fan holder
Fan duct
Tower stand
2.0 Tools Required
List the type and size of the tools that would typically be used to disassemble the product to a point where components
and materials requiring selective treatment can be removed.
Tool Description
Description #1 Phillips screwdriver
Description #2 Dikes
Description #3 Torx screwdriver
3.0 Product Disassembly Process
3.1 List the basic steps that should typically be followed to remove components and materials requiring selective treatment:
1.
To remove the access panel, press the buttons on the left and right sides of the computer (1) then slide the access
panel back until it stops and lift it up and off the chassis (2) (see Figure 1).
2.
To remove the front bezel, lift up the latch behind the upper right side of the bezel and push down on the latch behind
the lower right side of the bezel (1), then pull the right side of the bezel off the chassis (2), followed by the left side.
(see Figure 2).
3. Remove or cut all expansion cards, cables, and any other devices from the system board.
4.
To remove the battery:
Locate the battery and battery holder on the system board. Depending on the type of battery holder on the system
board, complete the following instructions to remove the battery.
TYPE 1 BATTERY HOLDER (see Figure 3):
Lift the battery out of the holder.
TYPE 2 BATTERY HOLDER (see Figure 4):
To release the battery from its holder, squeeze the metal clamp that extends above one edge of the battery. When the
battery pops up, lift it out.
TYPE 3 BATTERY HOLDER (see Figure 5):
Pull back on the clip that holds the battery in place, and then remove the battery.
5.
To remove the system board:
a. Remove the fan shroud from the chassis.
b. Rotate the drive cage to its upright position.
c. Rotate the power supply to its full upright position.
d. Disconnect all data and power cables from the system board.
e. Disconnect the serial port from the system board.
f. Remove the heatsink from the system board by loosening the four captive screws that secure the heatsink to the
system board, and then lifting the heatsink from the system board.
g. Remove the seven screws that secure the system board to the chassis (see Figure 6).
h. Lift up the front of the system board, and then pull the system board forward, up, and out of the chassis.
6.
To remove the power supply:
a. Rotate the drive cage up and disconnect the power cables from all of the drives.
b. Disconnect the power cables from the system board.
c. Release the power supply cables from the cable retaining clips on the bottom of the chassis and under the drive
cage.
d. Pull the power supply forward until the posts on the power supply (see Figure 7) move forward in the power supply
bracket, and then lift the power supply straight up and out of the chassis.
EL-MF877-00
Template Revision A
Plastic Part
Description
Weight (grams)
Main bezel
75g
Fan holder
54g
Fan duct
48g
Tower stand
126g
ISO 11469:2000 Plastic Part
Mark
>ABS<
>PC FR(40)<
>PC+ABS FR(40)<
>ABS<
Optional:
Photo
Tool Size (if
applicable)
T-15
Page 2

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