Lenovo System x3550 M4 Installation And Service Manual page 165

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Installation and service manual (908 pages)

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Table of Contents

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is

• If an action step is preceded by "(Trained technician only)," that step must be performed only by a trained

• Go to the support website at http://www.lenovo.com/support to check for technical information, hints, tips,

and new device drivers or to submit a request for information.

The OVER SPEC LED on the

light path diagnostics panel

is lit, or the Pwr rail 4 error

has been recorded in the IMM

• PCI riser-card assembly 1 (see "Removing a PCI riser-card assembly" on

page 220 and "Replacing a PCI riser-card assembly" on page 221).

• Optional adapter (if one is present) installed in PCI riser-card assembly 1 (see

"Removing an adapter" on page 225 and "Replacing an adapter" on page

5. Follow actions in "Solving power problems" on page 156, if the OVER SPEC

LED on the light path diagnostics panel is still lit.

6. Replace the power supply if the OVER SPEC LED on the light path diagnostics

panel is still lit.

1. Disconnect the server power cords.

2. Remove the following components if the Pwr rail 4 error has been recorded

in the IMM event log:

• Optional PCI adapter power cable (if one is present)

• Hard disk drives

• DIMMs 7 through 12

3. Restart the server. If the Pwr rail 4 error has been recorded in the IMM event log

again, (trained technician only) replace the system board (see "Removing the

system board" on page 300 and "Replacing the system board" on page 304).

4. Reinstall the components one at a time, in the order shown, restarting the

server each time. If the Pwr Rail 4 error has been recorded in the IMM event

log again, the component that you just reinstalled is defective. Replace the

defective component.

• DIMMs 7 through 12 (see "Removing a memory module" on page 213 and

"Installing a memory module" on page 45).

• Hard disk drives

• Fan 2 (see "Removing a hot-swap fan" on page 243 and "Replacing a

hot-swap fan" on page 244).