16 Sun Fire X4140, X4240, and X4440 Servers Diagnostics Guide • August 2008
Note – The DIMM Fault and Motherboard Fault LEDs operate on stored power for
up to a minute when the system is powered down, even after the AC power is
disconnected, and the motherboard (or mezzanine board) is out of the system. The
stored power lasts for about half an hour.
Note – Disconnecting the AC power removes the fault indication. To recover fault
information look in the SP SEL, as described in the Sun Integrated Lights Out Manager
2.0 User's Guide.
■ DIMM fault LED is off – The DIMM is operating properly.
■ DIMM fault LED is flashing (amber) – At least one of the DIMMs in this DIMM
pair has reported 24 CEs within a 24-hour period.
■ Motherboard Fault LED on mezzanine is on – There is a fault on the motherboard.
This LED is there because you cannot see the motherboard LEDs when the
mezzanine board is present.
Note – The Motherboard Fault LED operates independently of the Press to See Fault
button, and does not operate on stored power.
See
FIGURE 3-1 for the locations of DIMMs and LEDs on the motherboard. See
FIGURE 3-2 for the locations of DIMMs and LEDs on the mezzanine board.
