Circuit card replacement (MSS)

You can replace all circuit cards in an MSS on site. You must turn off the server before you can replace or add a circuit card.

Use this procedure to:

• Reseat a circuit card to determine if a board is faulty or just loose
• Replace a faulty circuit card in an MSS

Replacing MSS circuit cards

To replace a circuit card in an MSS-S or MSS-H:

1. Verify that the replacement equipment is on site and appears to be in usable condition, with no obvious shipping damage.
2. Remove the old circuit card.
3. Install the new circuit card.
4. Verify new card operation.

Remove the old circuit card

To remove a faulty circuit card:

1. Shut down the server and unplug the AC power cords.
2. Remove the front bezel and top cover.
3. Remove the circuit card hold-down bracket.

Caution! Observe proper electrostatic discharge (ESD) precautions when you handle computer components. Wear an antistatic wrist strap that touches your bare skin and connect the strap cable to an earth ground. For more information, see Protecting against ESD damage.

4. Locate the circuit card that you want to reseat or replace:
• MSS-S: See figure MSS standard configuration (back view).
  • Remote maintenance board (RMB)
  • Nonintegrated video and LAN model only:
    • Video card (closest to the power supply)
    • Network interface card (NIC)
• MSS-H: See figure MSS high-availability configuration (back view).
  • SCSI RAID controller card
  • Remote maintenance board (RMB)
  • Nonintegrated video and LAN model only:
    • Video card (closest to the power supply)
    • Network interface card (NIC)
5. Before you replace the circuit card, verify that the board is seated securely in the slot connector and that any cables are securely connected.
   • If the circuit card connections were loose, reseating them might fix the problem. Restore power to the server and verify circuit card operation.
   • If the circuit card connections were secure, continue with this procedure.
6. Remove any exterior cables connected to the circuit card you want to replace. These include:
   • RMB modem and COM cables
   • Nonintegrated video and LAN model only:
     • Video card monitor cable
     • NIC LAN cable

Note: Label the cables so you can easily reconnect them. For more information, see Installation and Upgrades (pdf).

7. Remove any interior cables connected to the circuit card you want to replace:
   • RMB ribbon cable to the fans, power supply, and reset switch. See figure Replacing the RMB ribbon cable.
   • MSS-H: SCSI RAID controller ribbon cable and SCSI LED cable. See figure Replacing the SCSI RAID controller cable (MSS-H).
8. Unscrew the retaining screw that attaches the circuit card to the chassis. Set the screw aside.
9. Lift the circuit card out. See figure Replacing a circuit card.

   Note: To remove the video card, you must release the safety catch at the back of the board before you can lift it out.

Install the new circuit card

To install a new circuit card:

1. Slide the card edge connector into the slot connector and the card slot retainer bracket into the slot guide. Apply pressure to the top of the card only, until the edge connector is firmly seated. See figure Replacing a circuit card.

   Note: To install a video card, hold open the safety catch until the card is seated, and then release it to lock the board in place.

2. Replace and tighten the retaining screw to hold the circuit card in place.
3. Reattach any interior cables.
• For the RMB, reconnect the ribbon cable to the 10-pin connector near the top back of the board. See figure Replacing the RMB ribbon cable.
• For a SCSI RAID controller card: See figure Replacing the SCSI RAID controller cable (MSS-H).
  1. Reconnect the ribbon cable to the upper edge connector near the SCSI card faceplate.
  2. Reconnect the SCSI LED cable to the 2 pins closest to the faceplate on the 8-pin connector near the upper edge of the SCSI board.
4. Reattach any exterior cables. For more information, see Installation and Upgrades (pdf).

Note: For a rack-mount setup, you might have to slide the server back into the cabinet to get enough slack to plug in the exterior cables.

5. Replace the circuit card hold-down bracket.
6. Replace the top cover and front bezel.
7. Restore power to the server.

Verify new circuit card operation

To verify that the new circuit card is working:

1. If you replaced one of the following cards, perform the appropriate verification checks:
   • RMB card:
     • After the server boots, test RMB functionality. For example, call in to the board, and run standard inquiries.
     • For more information, see Remote Maintenance Board (RMB) CYN23AP and CYN24AP Reference (pdf). This document is available through the Avaya Support Web site under Modular Messaging.
   • MSS-H: SCSI RAID controller card:
     • After the server boots, verify that the application software loads correctly.
   • NIC LAN card: After restoring power to the server:
     • Ping the address of the new card through the network.
     • Verify that the new card is present and answering.
   • Video card: After the server boots:
     • Bring up a GUI application, such as the Web interface to this product.
     • Verify that the application displays correctly.
2. Verify that any circuit pack alarms are resolved. For more information, see MSS alarms.

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