System Board Led Locations - IBM TotalStorage 200 Service Manual

Figure 12 identifies system-board LEDs. You might need to refer to this figure when
troubleshooting a problem.
Management Processor
Figure 12. System board LED locations
Note: The power-on indicator (CR56) is on when system power is present in the
Diagnostics panel LEDs:
PS1
PS2
PS3
NON
OVER Overspec. The system has exceeded the power capabilities of the installed
NMI
TEMP System temperature exceeded maximum rating.
FAN
MEM
CPU
PCI A Error on PCI channel A or system board.
50
Models 200 and 225 Service Guide
Table 18. Switches 1 - 8 (continued)
Switch Switch
number description
5 Power-on override. The default setting is Off (disabled).
When On, overrides the power-on switch and forces power-on mode. The
system will always boot without the use of the power-on switch.
4 Reserved.
3 Reserved.
2 Reserved.
1 Reserved.
DIMM 4
failure (CR20)
DIMM 3
failure (CR18)
DIMM 2
failure (CR28)
DIMM 1
failure (CR21)
Power-on
(CR56)
Advanced System
error (CR70)
appliance. When this LED flashes, the appliance is in standby mode (the
system power supply is turned off and current is present).
Power supply 1 failure.
Power supply 2 failure.
Power supply 3 failure.
Non-redundant power.
power supply units.
Non-maskable-interrupt occurred.
A fan failed or is operating slowly.
Memory failure. One or more memory DIMMS have failed.
Microprocessor failure. One or both microprocessors have failed.
Microprocessor 2
failure (CR7)
Microprocessor 1
failure (CR1)
Voltage regulator module
(VRM2) failure (CR16)
Integrated voltage regulator
(VRM1) failure (CR4)
Diagnostics panel