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9-4 Ultra Enterprise 6000/5000/4000 Systems Manual—November 1996
9
Caution – If the left green LED is lit, do not remove the board. Electrical
shorting will result, damaging the board and the system.
For the CPU/Memory and I/O boards:
• If the yellow LED (middle LED) is continuously lit (not flashing) the board
requires service.
• If the left and right green LEDs are off, the board is ready for removal.
• If no LEDs are flashing, the system is hung.
• If no LEDs are lit, there is no electrical power to the board.
Table 9-2 summarizes LED codes for these boards. The symbols shown in the
table are marked on the card cage frame.
Table 9-2 Board Status LED Codes
Power Service Cycling
Condition
Off Off Off Board has no electrical power.
Off On Off Board is in low power mode, can be unplugged.
Off Off Flashing Undefined.
Off On Flashing Undefined.
On Off Off System is hanging, either in POST/OBP or OS.
On Off On Hung in OS.
On On Off (Hung in POST/OBP) or (hung in OS and failed
component on board).
On On On (Hung in POST/OBP) or (hung in OS and failed
component on board).
On Off Flashing OS running. System is operating normally.
On On Flashing OS running and failed component on board.
On Flash Off Slow flash = POST. Fast flash = OBP.
On Flash On OS or OBP error.
!