HP dx2420 Service Reference Guide: HP Compaq dx2420 Business PC - Page 67

Processor, Preparation for Disassembly, on Computer Access Panel, Heat sink

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Processor 1. Prepare the computer for disassembly (Preparation for Disassembly on page 28). 2. Remove the computer access panel (Computer Access Panel on page 32). 3. Remove the heat sink (Heat sink on page 60). 4. Rotate the locking lever to its full open position (1). 5. Raise and rotate the microprocessor retainer to its fully open position (2). 6. Carefully lift the processor from the socket (3). CAUTION: Do NOT handle the pins in the processor socket. These pins are very fragile and handling them could cause irreparable damage. Once pins are damaged it may be necessary to replace the system board. The heat sink must be installed within 24 hours of installing the processor to prevent damage to the processor's solder connections. Figure 6-39 Removing the processor To install a new processor: 1. Place the processor in its socket and close the retainer. 2. Secure the locking lever. If reusing the existing heat sink, go to step 3. If using a new heat sink, go to step 5. 3. If reusing the existing heat sink, apply the thermal grease provided in the spares kit to the top of the processor. 4. Clean the bottom of the heat sink with the provided alcohol pad and place it atop the processor. Processor 61

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Processor
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
28
).
2.
Remove the computer access panel (
Computer Access Panel
on page
32
).
3.
Remove the heat sink (
Heat sink
on page
60
).
4.
Rotate the locking lever to its full open position
(1)
.
5.
Raise and rotate the microprocessor retainer to its fully open position
(2)
.
6.
Carefully lift the processor from the socket
(3)
.
CAUTION:
Do NOT handle the pins in the processor socket. These pins are very fragile and
handling them could cause irreparable damage. Once pins are damaged it may be necessary to
replace the system board.
The heat sink must be installed within 24 hours of installing the processor to prevent damage to
the processor’s solder connections.
Figure 6-39
Removing the processor
To install a new processor:
1.
Place the processor in its socket and close the retainer.
2.
Secure the locking lever.
If reusing the existing heat sink, go to step 3.
If using a new heat sink, go to step 5.
3.
If reusing the existing heat sink, apply the thermal grease provided in the spares kit to the top of
the processor.
4.
Clean the bottom of the heat sink with the provided alcohol pad and place it atop the processor.
Processor
61