IBM 8669 Hardware Maintenance Manual - Page 48

System board LED locations

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Table 2. Switches 1-8 (continued) Switch number Description 7 Reserved. The default setting is Off. 8 Power-on override. When On, overrides the power-on switch and forces power-on mode. The system will always start without the use of the power-on switch. the default setting is Off (disabled). Note: In most cases the speed settings are locked and there is no need to change them. System board LED locations The following illustration identifies LEDs on the system board. You might need to refer to this figure when solving problems with the server. VRM 1 error LED (CR19) DIMM 4 error LED (CR15) DIMM 3 error LED (CR14) DIMM 2 error LED (CR17) DIMM 1 error LED (CR16) Microprocessor 1 error LED (CR13) Fan sink 1 LED (CR78) Microprocessor 2 error LED (CR20) Fan sink 2 LED (CR79) VRM 2 error LED (CR18) Light path diagnostics panel Integrated System Management Processor Remind button LED (CR70) 38 Hardware Maintenance Manual: xSeries 342 Type 8669

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Table 2. Switches 1-8 (continued)
Switch
number
Description
7
Reserved. The default setting is Off.
8
Power-on override.
When On, overrides the power-on switch and forces power-on mode. The system will always start
without the use of the power-on switch. the default setting is Off (disabled).
Note:
In most cases the speed settings are locked and there is no need to change
them.
System board LED locations
The following illustration identifies LEDs on the system board. You might need to
refer to this figure when solving problems with the server.
DIMM 4 error LED
(CR15)
DIMM 3 error LED
(CR14)
DIMM 2 error LED
(CR17)
DIMM 1 error LED
(CR16)
Light path
diagnostics panel
Microprocessor 2
error LED (CR20)
Fan sink 1 LED
(CR78)
Fan sink 2 LED
(CR79)
Microprocessor 1
error LED (CR13)
VRM 2 error LED
(CR18)
VRM 1 error LED
(CR19)
Remind button
Integrated System
Management Processor
LED (CR70)
38
Hardware Maintenance Manual: xSeries 342 Type 8669