MAP 0080: System Bus Problem Isolation

Purpose of This MAP

Use this MAP to analyze a bus problem that does not prevent the system from booting.

• Step 0080-1
  1. Perform a system shutdown and then, if necessary, turn off the system unit power.
  2. Locate the diagnostic CD-ROM.
  3. Turn on the system unit power, and then load the diagnostic CD-ROM into the CD-ROM drive.
  4. Load the standalone diagnostics.
  5. Wait until the "Please Define the System Console" screen displays or all system activity appears to have stopped.
  Is the "Please Define the System Console" screen displayed?

  No

  The symptom has changed. Use the start-of-call procedure in the Information Center.

  Yes

  Go to Step 0080-2.

• Step 0080-2

  Follow the instructions on the screen.

  Are all of the installed PCI adapters listed on the Installed Resources menu?

  No

  Go to Step 0080-3 and make a note of all PCI adapters not listed and their locations.

  Yes

  You may have an intermittent problem. If you think that you have an intermittent problem, go to MAP 0040: Intermittent Problem Isolation.

• Step 0080-3
  1. Perform a system shutdown, and then, if necessary, turn off the system unit power.
  2. Remove all but one of the PCI adapters that was not listed on the Installed Resources menu.
     Note: If only one adapter is present, do not remove it.
  3. Turn on the system unit power, and load standalone diagnostics from the optical drive.
  4. Wait until the "Please define the System Console" screen displays or all system activity appears to have stopped.
  Is the "Please Define the System Console" screen displayed?

  No

  The symptom has changed. Use the start-of-call procedure in the Information Center.

  Yes

  Go to Step 0080-4.

• Step 0080-4

  Follow the displayed instructions until the Installed Resources menu displays.

  Is the adapter that you did not remove shown as an installed resource?

  No

  Record SRN 111-78C and make a note of the adapter you just installed. Look up the SRN in the SRN listings and perform the indicated action.

  Yes

  Go to Step 0080-5.

• Step 0080-5
  Have you installed all of the removed adapters?

  No

  Go to Step 0080-6.

  Yes

  Call your service support structure.

• Step 0080-6
  1. Perform a system shutdown and then, if necessary, turn off the system unit power.
  2. Install one of the remaining removed adapters into its original location.
  3. Turn on the system unit power, and load standalone diagnostics from the optical drive.
  4. Wait until the "Please Define the System Console" screen displays or all system activity appears to stop.
  Is the "Please Define the System Console" screen displayed?

  No

  The symptom has changed. Go to PFW1540: Problem Isolation Procedure.

  Yes

  Go to Step 0080-7.

• Step 0080-7

  Follow the displayed instructions until the Installed Resources menu displays.

  Is the adapter that you just installed shown as an installed resource?

  No

  Record SRN 111-78C and make a note of the adapter you just installed. Look up the SRN in the SRN listings and perform the indicated action.

  Yes

  Go to Step 0080-5.