Sun Oracle Sun Server X4-2, Service Manual

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14 Sun Server X4-2 Service Manual • May 2014
Processor Fault Status Indicators
The motherboard includes a fault status indicator (LED) adjacent to each of the two
processor sockets. These LEDs indicate when a processor is faulty. For example, if on
reboot the BIOS detects that there are uncorrectable processor errors recorded in the
machine check architecture (MCA) registers left over from the previous boot, then the
BIOS and Oracle ILOM work together to record and diagnose these errors. If it is
determined that a processor is faulty, pressing the Fault Remind button on the
motherboard signals the service processor to light the fault LED associated with the
faulted processor.
Fault Remind Status Indicator
This status indicator (LED) is located next to the Fault Remind button and is
powered from the super capacitor that powers the fault LEDs on the motherboard.
This LED lights to indicate that the fault remind circuitry is working properly in
cases where no components have failed and, as a result, none of the component fault
LEDs illuminate.
STBY PWRGD Status Indicator
The service instructions for all server internal components require that all AC power
be removed from the power supplies prior to removing the server top cover. This
green status indicator (LED) is labeled STBY PWRGD and is located on the rear of the
server near PCIe slot 2.
Note – If a PCIe card is installed in PCIe slot 2, this LED might not be visible.
The STBY PWRGD LED lights to inform the service technician that the motherboard
is receiving standby power from at least one of the power supplies. This LED is
provided to help prevent service actions on the server internal components while the
AC power cords are installed and power is being supplied to the server.
Related Information
■
“Front Panel Controls and Indicators on a System With Eight 2.5-inch Drives” on
page 3
■
“Front Panel Controls and Indicators on a System With Four 2.5-inch Drives and
DVD Drive” on page 4
■
“Server Back Panel View” on page 5
■
“Illustrated Parts Breakdown” on page 15