IBM BladeCenter HS20 Installation And User Manual page 31

Table 3. Light path diagnostics panel LEDs
LED error
NMI
MIS (microprocessor speed
mismatch)
S BRD (system board)
TEMP (over temperature)
Light path diagnostics LED
(CR111)
Light path diagnostics button
(SW4)
See "Diagnosing problems using light path diagnostics" on page 59 for information
on what action to take if there is a component error.
Action
Check error log for additional information. Restart the blade
server. If the error still exists, call for service.
Check microprocessors to make sure that they are the same
speed.
Restart the blade server. If the error still exists, call for
service.
Check the BladeCenter blowers for correct operation and
the air inlets for obstructions. Make sure that the
temperature of the room where the blade server is installed
is within the limits specified by the "Features and
specifications" on page 7.
Lights to show that the light path diagnostics circuit is active
and functioning. Check the other light path diagnostic LEDs
for errors.
Press SW4 to find faults on the system board. If the
microprocessor or memory LED is lit, reseat the component.
If the LED remains lit, replace the defective component.
Chapter 2. Power, controls, jumpers, switches, and indicators
19