| Notes |
The Unplanned - System Hardware Failure category contains cause codes for CPU System Boards, I/O Boards, and System Interface Boards. Use these three cause codes according to the following rules:
- If a CPU is on or can be inserted onto the board use Unplanned - System Hardware Failure - CPU System Board for unplanned events (even if the board also contains SBus, PCI, or cPCI slots).
- If the board contains only SBus, PCI, or cPCI slots, use Unplanned - System Hardware Failure - System Interface Board for unplanned events for a board
- All unplanned events for SBus, PCI, or cPCI cards are assigned to Unplanned - System Hardware Failure - I/O Board
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