Apple IMAC Service Source - Page 156

not have a torque driver, you will have to make sure these screws are tightened by hand FIRMLY,

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Procedure 1. Thoroughly clean the original thermal film from the four mating surfaces circled below. Use a plastic stylus to scrape the surfaces clean. Note: Do not use an abrasive material or liquid cleaner. 2. Squeeze a drop of thermal paste onto the thermal pipe locations circled below. 3. Close the bottom housing. Warning: The bottom housing has four torx screws that must be tightened to at least 17 in.-lbs. If you do not have a torque driver, you will have to make sure these screws are tightened by hand FIRMLY, BUT NOT FORCIBLY. Or, purchase the service tool (076-0899) in order to ensure the thermal pipe is firmly mated with the top base. If the bottom housing is not securely attached to the base in this fashion, the CPU may overheat and become damaged. General Information iMac (USB 2.0) Troubleshooting - 11

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iMac (USB 2.0) Troubleshooting -
11
General Information
Procedure
1.
Thoroughly clean the original thermal film from the four mating surfaces circled below. Use a plastic
stylus to scrape the surfaces clean.
Note:
Do not use an abrasive material or liquid cleaner.
2.
Squeeze a drop of thermal paste onto the thermal pipe locations circled below.
3.
Close the bottom housing.
Warning:
The bottom housing has four torx screws that must be tightened to at least 17 in.-lbs. If you do
not have a torque driver, you will have to make sure these screws are tightened by hand FIRMLY, BUT
NOT FORCIBLY. Or, purchase the service tool (076-0899) in order to ensure the thermal pipe is firmly
mated with the top base. If the bottom housing is not securely attached to the base in this fashion, the
CPU may overheat and become damaged.