3. Ensure that each processor and heat sink is properly installed.4. Install the system-board assembly.5. Reconnect the system to the electrical outlet, and turn on the system and attached peripheraldevices.6. If the problem persists, turn off the system and attached peripheral devices, and disconnect thesystem from the electrical outlet.7. Remove the system-board assembly.8. Remove processor 2.9. Install the system-board assembly.10. Reconnect the system to the electrical outlet, and turn on the system and attached peripheraldevices.If the problem persists, the processor is faulty. See Getting help.11. Turn off the system and attached peripheral devices, and disconnect the system from the electricaloutlet.12. Remove the system-board assembly.13. Replace processor 1 with processor 2.14. Repeat step 9 through step 11.If you have tested both the processors and the problem persists, the system board is faulty. SeeGetting help.IRQ assignment conflictsMost PCI devices can share an IRQ with another device, but they cannot use an IRQ simultaneously. Toavoid this type of conflict, see the documentation for each PCI device for specific IRQ requirements.Table 12. Assignment specific IRQ requirementsIRQ Line AssignmentIRQ0 8254 timerIRQ1 Keyboard controllerIRQ2 Cascade for IRQ9IRQ3 Serial port (COM2) or PCI_IRQ_POOL_DEFINITIONIRQ4 Serial port (COM1) or PCI_IRQ_POOL_DEFINITIONIRQ5 PCI_IRQ_POOL_DEFINITIONIRQ6 PCI_IRQ_POOL_DEFINITIONIRQ7 RESERVEIRQ8 RTCIRQ9 PCI_IRQ_POOL_DEFINITION83