IBM 7943, Руководство по диагностике и обслуживанию

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v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See Chapter 4, “Parts listing, System x3655, Type 7985 and 7943,” on page 93 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
v
If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
System event/error log message Action
+12V planar fault
1. If the OVER SPEC LED on the light path diagnostics panel is
lit, or any of the four power channel error LEDs (A, B, C, or D)
on the system board are lit, see the entries about
power-channel error LEDs in “Power problems” on page 46.
(See “System-board LEDs” on page 17).
2. If the actions in “Power problems” on page 46do not identify a
defective component, complete the following steps:
a. Remove the power supplies. Replace the power supplies
one at a time, restarting the server each time, to isolate a
failing power supply.
b. If the server fails to start, replace the power backplane.
Restart the server.
c. If the server fails to start, (trained service technician only)
replace the system board.
+5V critical over voltage fault
1. Remove the following devices, which are powered by 5 volts:
v
All PCI adapters
v
USB devices
v
CD-RW/DVD drive
v
Tape drive, if one is installed
v
Hard disk drive backplane
2. Reinstall each I/O device removed in step 1, one at a time,
restarting the server each time, to isolate a defective device.
Replace any defective device.
3. If the error continues, replace the power backplane. Restart the
server.
4. If the error continues, (trained service technician only) replace
the system board.
+5V critical under voltage fault
1. Remove the following devices, which are powered by 5 volts:
v
All PCI adapters
v
USB devices
v
CD-RW/DVD drive
v
Tape drive, if one is installed
v
Hard disk drive backplane
2. Reinstall each I/O device removed in step 1, one at a time,
restarting the server each time, to isolate a defective device.
Replace any defective device.
3. If the error continues, replace the power backplane. Restart the
server.
4. If the error continues, (trained service technician only) replace
the system board.
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IBM System x3655 Type 7985 and 7943: Problem Determination and Service Guide