Probleml System message indicates a problem with the microprocessorl Heat sink is not installed for the microprocessorl Fan is not operating properlyAction1. 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 "InstallingSystem 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."NOTE: Microprocessors with an internal speed of less than 3.06 GHz use an active cooling heat sink. Microprocessors with internal speeds greater thanor equal to 3.06 GHz use a passive heat sink and plastic shroud.CAUTION: Before you perform this procedure, see "Safety First—For You and Your System."CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System Information Guide.Troubleshooting the System BoardProbleml System message indicates a problem with the system boardAction1. 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").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."CAUTION: Before you perform this procedure, see "Safety First—For You and Your System."CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System Information Guide.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 bootdrive.