You must determine if the motherboard is faulty before you replace it.
-> show /System/Processors /System/Processors Targets: CPUs Properties: health = OK health_details = - ... ->
If the health_details property identifies a faulty CPU, replace the motherboard. See Remove the Motherboard.
-> show /System/Processors/CPUs/CPU_x /System/Processor/CPUs/CPU_0 Targets: Properties: health = OK health_details = - ... ->
where x is the number of the CPU, either 0 or 1.
If the health_details property identifies the CPU as faulty, replace the motherboard. See Remove the Motherboard.
-> show /System/Networking /System/Networking Targets: Ethernet_NICs Properties: health = OK health_details = - ... ->
If the health_details property identifies a faulty interface, consider replacing the motherboard. See Remove the Motherboard.
-> show /System/Networking/Ethernet_NICs/Ethernet_NIC_x /System/Networking/Ethernet_NICs/Ethernet_NIC_0 Targets: Properties: health = OK health_details = - ... ->
where x is the number of the interface, from 0 to 3.
If the health_details property identifies the interface as faulty, consider replacing the motherboard. See Remove the Motherboard.
If the motherboard is faulty, you will see /SYS/MB, /SYS/MB/P0, or /SYS/MB/P1 under the Value heading.
For example:
-> show faulty Target | Property | Value --------------------+------------------------+------------------------------- /SP/faultmgmt/0 | fru | /SYS/MB ... ->
If the motherboard is faulty, replace it. See Remove the Motherboard.
If a FRU value different from /SYS/MB, /SYS/MB/P0, or /SYS/MB/P1 is displayed, see Component Service Task Reference to identify which component is faulty.
See Display Faults (faultmgmt Shell).
Check the Fault class and Description fields for more information.
If the motherboard is faulty, replace it. See Remove the Motherboard.
-> show /SYS/VPS value /SYS/VPS Properties: value = 159.175 Watts ->
If the power displayed is unreasonable or none at all, replace the motherboard. See Remove the Motherboard.