HP 9000 A-180 User Manual page 76

A-Class System Service
A-Class Server Trouble Shooting
Step 2. If the fault does not recur, the problem was caused by the SIMM that is not presently
installed. Boot the system and resume normal operations. If the fault recurs, proceed to step 3.
Step 3. Replace the SLC SIMM in slot B with the other original SLC SIMM. Power up and observe
front panel LEDs.
Step 4. If the fault does not recur, the problem is with the SLC SIMM previously installed in slot B.
Boot the system and resume normal operations.
Step 5. If the fault recurs, the problem is with the system board. To change the system board, you
must replace the A-Class Exchange Base Unit (EBU). Refer to the "Replacing an A-Class
Server Exchange Base Unit (EBU)" section.
Random Access Memory (RAM) Module Fault. This fault occurs when a RAM
failure prevents the system from completing selftest. Chassis codes provided by the
HSC Remote Management card are useful in troubleshooting this type of error. For
example, FLT 7xxx indicates a failure in the memory selftest.
NOTE SIMM is an acronym for Single Inline Memory Module. A SIMM has components
on one side of the card, only.DIMM is an acronym for Dual Inline Memory Module.
A DIMM has components on both sides of the card.The acronym SIMM will be
used throughout this section to refer to either SIMM or DIMM.
Electrostatic Discharge Precautions. The procedures in this section require opening the
server and exposing the system to electrostatic discharge. Always observe all electrostatic
precautions when working with components inside or out of the server. Failure to follow these
precautions may result in component damage or loss of system reliability.
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Before You Do Anything...
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NOTE
Cabinet-mounted servers must be removed from the cabinet before proceeding.
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Use a grounding mat and an anti-static wrist strap.
Wear the anti-static wrist strap to ensure that any accumulated electrostatic charge is
discharged from your body to ground.
Power down the system.
Unplug the server.
Remove the top of the server by unscrewing the knurled captive screws on each side of
Chapter 3