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6. Ensure that the new system board jumper settings match the old system board
jumper settings.
Replacing a processor - Microtower Model
Attention: When you handle ESD-sensitive devices, take precautions to avoid
damage from static electricity. For details on handling these devices, see “Handling
electrostatic discharge-sensitive devices” on page 210.
1. Review the safety precautions listed in “Safety information” on page 207.
2. Turn off the system and peripheral devices and disconnect all external cables
and power cords; then, remove the cover (see “Removing the cover -
microtower model” on page 44 for details).
3. Push down on the retainer clip, and at the same time, use a flat bladed
screwdriver to carefully pry the metal loop from under the hook attaching the
fansink to the processor.
4. Carefully remove the other metal loop from the hook attaching the fansink to
the processor. Lift up and remove the fansink.
Note: Once you remove the heat sink from the microprocessor, you must
replace it with a new device.
5. Pull out and lift up the release lever and remove the microprocessor from the
connector. Store the microprocessor in a static-protective bag for possible future
use.
Power supply removal - Microtower Model
1. Remove the cover (see “Removing the cover - microtower model” on page 44).
2. Remove the screw that secures the power supply to the rear of the chassis.
3. Push the metal tab that secures the power supply to the chassis to release the
power supply.
66 Hardware Maintenance Manual