NOTE: Microprocessors with an internal speed of less than 3.06 GHz use an active cooling heat sink. Microprocessors with internal speeds greater than or equal to 3.06 GHz use a passive heat sink and plastic shroud.
Problem
•System message indicates a problem with the microprocessor
•Heat sink is not installed for the microprocessor
•Fan is not operating properly
Action
CAUTION: Before you perform this procedure, see "Safety
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System Information Guide.
1.Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
2.Remove the cover (see "Removing the Cover").
3.Lay the system on its right side.
4.Ensure that the microprocessor and heat sink with cooling fan are properly installed (see "Removing and Installing a Microprocessor" in "Installing System Options").
5.Stand the system upright.
6.Install the cover (see "Installing the Cover").
7.Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.
8.Run Quick Tests in the system diagnostics (see "Running the System Diagnostics").
If the tests fail or the problem persists, see "Getting Help."
Troubleshooting the System Board
Problem
•System message indicates a problem with the system board
Action
CAUTION: Before you perform this procedure, see "Safety
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System Information Guide.
1.Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
2.Remove the cover (see "Removing the Cover").
3.Lay the system on its right side.
4.Remove all expansion cards installed in the system (see "Removing an Expansion Card" in "Installing System Options").
NOTE: If the boot drive is connected to a SCSI or RAID controller card, remove all expansion cards except the controller card used by the boot drive.
5.Stand the system upright.
6.Install the cover (see "Installing the Cover").
7.Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.
8.Run Quick Tests in the system diagnostics (see "Running the System Diagnostics").
If the tests fail, see "Getting Help."