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I2CBUS

A fault was detected on the I2C bus.

Choose the model or I/O expansion unit you are working on:

Parent topic: Symbolic FRUs

Instructions for Models 285, 505, 51x, 52x, 55x, 561 , 570, OpenPower 710, and OpenPower 720

  1. Is the reference code 3114?
    • No: Continue with the next step.
    • Yes: Replace the following (see Finding part locations for part numbers and a link to the exchange procedure):
      • For models 285, 505, 51x, 52x, 55x, OpenPower® 710, and OpenPower 720, replace the system backplane (SYSBKPL).
      • For models 561 and 570 (4-core), replace the I/O backplane (SYSBKPL).
      • For models 561 and 570 (8-core through 16-core), verify that the service processor cable is connected and seated properly on all units. If the reference code prevails, replace the following, one at a time, until the problem is resolved:
        1. service processor cable (see Locations — model 561 and 570)
        2. service processor (see Locations — model 561 and 570)
        3. I/O backplane on the failing unit (see Locations — model 561 and 570)
      • For model 575, replace the system I/O backplane (seeLocations — model 575
      • For models 590 and 595, replace the FSP card (seeLocations — model 590 and 595
      This ends the procedure.
  2. Is the reference code 3109?

Instructions for 5095, 0595, 5790, 7311-D10, D11, and D20 I/O expansion units

  1. Is the reference code 3100, 3104, 3105, 3116, or 3118?
    • No: Continue with the next step.
    • Yes: Replace the backplane (TWRCARD). See Finding part locations for part numbers and a link to the exchange procedure. This ends the procedure.
  2. Is the reference code 3101 or 3115?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time (see Finding part locations for part numbers and a link to the exchange procedure):
      • Display panel (If the unit is a 5790 or a 7311-7311-D10, the left power supply is the failling FRU.)
      • Backplane (TWRCARD)
      • Signal cable SIGC01 (connecting the backplane to the display panel). This ends the procedure.
  3. Is the reference code 3102, 3113, or 3114?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time (see Finding part locations for part numbers and a link to the exchange procedure):
      • Backplane (TWRCARD)
      • Signal cable SIGC04 (connecting the SPCN card to the tower card). This ends the procedure.
  4. Is the reference code 3103 or 3112?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time:
  5. Is the reference code 3121?
    • No: Return to Start of call procedure. This ends the procedure.
    • Yes: Is this for a FC5790 (7311-D11)?
      • No: Replace device board 1 (see Finding part locations for part numbers and a link to the exchange procedure). This ends the procedure.
      • Yes: Replace the following FRUs (see Finding part locations for part numbers and a link to the exchange procedure), one at a time, until the problem is resolved:
        • Rio-G Riser card
        • I/O Planar
        This ends the procedure.

Instructions for all I/O expansion units except 5095, 0595, 5790, 7311-D10, D11, and D20

  1. Is the reference code 3101, 3105, 3115, or 3116?
    • No: Go to step 3.
    • Yes: Continue with the next step.
  2. Are you working on a 5088 or 0588?
    • No: Replace the following FRUs (see Finding part locations):
      • Control panel NB1
      • Tower card CB1
      • Power cable PWR60 (connecting power distribution board PB1 to device board DB3).
      • Signal cable SIG63 (connecting control panel NB1 to device board DB3). This ends the procedure.
    • Yes: Replace the following FRUs (see Locations — 5088 and 0588 expansion I/O units):

      For reference code 3101 or 3115:

      • Control panel NB1
      • Tower card CB1

      For reference code 3105 or 3116:

      • Fan controller assembly BB1
      • Tower card CB1

      This ends the procedure.

  3. Is the reference code 3102?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time (see Finding part locations):
      • HSL I/O bridge C08
      • Tower card CB1

      This ends the procedure.

  4. Is the reference code 3103?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time (see Finding part locations):

      For 5088 and 0588:

      • Tower card CB1

      For 5074, 5079, 5094, and 5294:

      • Device board DB1
      • Device board 2
      • Device board DB3
      • Tower card CB1

      This ends the procedure.

  5. Is the reference code 3104, 3114, or 3118?
    • No: Continue with the next step.
    • Yes: Replace the tower card CB1 (see Finding part locations). This ends the procedure.
  6. Is the reference code 3106?
    • No: Continue with the next step.
    • Yes: Replace the network interface controller (NIC) card M41. (see Finding part locations). This ends the procedure.
  7. Is the reference code 3110, 3111, or 3112?
    • No: Go to step 11.
    • Yes: Continue with the next step.
  8. Is the reference code 3110?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time (see Finding part locations):
      • Device board DB1
      • Tower card CB1

      This ends the procedure.

  9. Is the reference code 3111?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time (see Finding part locations):
      • Device board 2
      • Tower card CB1

      This ends the procedure.

  10. Is the reference code 3112?
    • No: Continue with the next step.
    • Yes: Replace the following FRUs one at a time (see Finding part locations):
      • Device board DB3
      • Tower card CB1

      This ends the procedure.

  11. Is the reference code 3113?
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Last updated: Fri, Oct 30, 2009