DS8000 Service Documentation Version 7.5

Exchange the CEC enclosure system backplane

Before you begin

CAUTION:

This assembly contains mechanical moving parts. Use care when servicing this assembly. (C025)

Icon for electrostatic discharge wrist strap Use approved ESD procedures to prevent damage.

Attention:

This is not a stand-alone procedure. Customer disruption and damage to the hardware might occur if microcode and power boundaries are not in the proper conditions for this service action.
If you were sent here by a serviceable event FRU repair, the microcode and power boundaries have already been set.
If you were not sent here by a serviceable event FRU repair, see MAP1230 Replace a FRU without using a serviceable event.

Notes:

All the cables and FRUs to be removed must be uniquely identified so they can be reinstalled correctly.
If an installed earthquake resistance kit prevents you from accessing this FRU, refer to MAP1600.

Remove the CEC enclosure system backplane

Procedure

Use a replacement part with a valid DS8000® part number to ensure it has the proper firmware, VPD, and/or configuration to ensure it is compatible with the DS8000 service procedures. Attempting to use a generic POWER7® server FRU might fail and require next level of support to recover.
All parts being removed must be marked or identified so they can be installed into their original locations.
Note: Failure to do this can extend the service duration and may require next level of support assistance.
If the CEC enclosure to be repaired is beneath the management console you are logged into:
1. Move the management console laptop from the service position to the DC-UPS service position , as shown in Figure 1. Refer to Management console service positions (Model 961).
2. Push the now empty management console tray fully into the rack. See Figure 1. This allows access to the top and rear of the CEC enclosure.
Figure 1. Alternate service position
Use the CEC enclosure front and rear blue identify LEDs to determine the CEC enclosure to be repaired. Both blue LEDs should be solidly lit.
- CEC control panel blue identify LED , as shown in Figure 2.
- CEC enclosure rear blue identify LED , as shown in Figure 2.
Note: If both the front and rear CEC enclosure identify LEDs are not lit, use the location code listed in the serviceable event FRU list. See MAP1245 Finding FRUs by using location codes.

Figure 2. CEC identify blue LEDs, front and rear
Verify the CEC enclosure is in the power-off state. See Figure 3.
1. At the rear of the CEC enclosure, view both CEC enclosure power supply DC GOOD LEDs.
2. Are both DC GOOD (output) LEDs blinking?
  - Yes, continue with the next step.
  - No, do not continue with this FRU replacement. Go to MAP4841 CEC enclosure fails to power off during service processor repair (Model 961).
Figure 3. CEC enclosure power supply LEDs (Model 961)
Disconnect the power cables (E1-J1 and E2-J1) from the CEC with the DC Good LEDs blinking. See Figure 4.
Note: The CEC enclosure power supply LEDs continue to blink for up to 20 seconds while internal power is discharged.
1. Each power cable is looped once around the CEC enclosure power supply handle and secured with a cable tie.
2. Remove the cable tie, unplug the cable and unwrap it from the handle.
Figure 4. Location codes for the CEC enclosure (rear view) (Model 961)
Observe the CEC enclosure control panel green power present icon . See Figure 5.
- If it is off, go to the next step.
- If it is slowly blinking, the CEC enclosure is still in the power-off state. DO NOT CONTINUE. Ensure that you have unplugged the power cables.
Figure 5. CEC enclosure control panel
Disconnect all remaining cables from the rear of the CEC enclosure. See Figure 4.
Remove the filler plugs from serial ports S1 and S2 (P1-T1 and P1-T2) at the rear of the CEC enclosure. See Figure 4.
At the front of the CEC enclosure, remove the two screws (10 mm hex head) that secure the CEC enclosure to the rack. See Figure 6.
Figure 6. Preparing the CEC enclosure for service position
Pull the CEC enclosure out about 20 centimeters (8 inches).
1. Hold the CEC enclosure release latches down on both the left and right sides, and pull the CEC partway out. See Figure 7.
Figure 7. Pulling the CEC enclosure out to the service position
At the rear of the CEC enclosure, disconnect the CEC enclosure end of the cable management arm from the slide rail to your right.
1. Locate the CEC enclosure end of the cable management arm, See Figure 8.
2. Pull the blue latch pin and slide the cable management arm towards the rear of the rack to release it from the CEC enclosure slide rail bracket . See Figure 9.
3. Ensure all cables are disconnected from the rear of the CEC enclosure and the cable management arm is free from the slide rail.
  Figure 8. Preparing the CEC enclosure for service position
  
  Figure 9. Releasing the cable management arm from the slide rail
Pull the CEC cable bundle back over the top of the cable management arm so they will not be damaged when the CEC enclosure is pulled out to the service position. See Figure 10.
Figure 10. CEC cables pulled back over the cable management arm
Pull the CEC enclosure fully out to the service position. Ensure both slide rails latch in the full out position.
Remove the CEC enclosure front cover. See Figure 11.
1. The front cover is held on by a post spring clip on the left and right ends.
2. Gently pull on the lower lip of the front cover at the left and then right ends.
  Note: Do not pull in the middle of the front cover.
Figure 11. Removing the CEC enclosure front cover
Remove the CEC enclosure service access cover. See Figure 12.
1. Loosen the two thumbscrews located at the back of the service access cover.
2. Slide the service access cover toward the back of the CEC enclosure. When the front of the service access cover has cleared the upper frame ledge, lift the service access cover up and off the CEC enclosure.
Figure 12. Removing the service access cover
Remove all memory cards and air baffles (if present). See Figure 13.
1. The memory card slots are P1-C15, P1-C16, P1-C17, P1-C18.
2. Take note of each card. It must be reinstalled in the same slot on the new system backplane.
3. If a slot contains a memory card, unlock the card latches , lift them into the open position, and then lift the card out of the slot.
4. If a slot contains an air baffle, lift it out.
Figure 13. Removing a memory card
Remove all installed PCIe three-port cards (P1-C1, P1-C8). See Figure 14 and Figure 15.
1. Unlock the card latches], lift them into the open position, and then lift the card out of the slot.
Figure 14. Removing a PCIe three-port card

Figure 15. Location codes for the CEC enclosure (rear view) (Model 961)
Remove the PCIe single-port cards (P1-C3, P1-C4). See Figure 16 and Figure 15.
1. Unlock the blue latch by pushing down on the blue tab behind the CEC enclosure. Then outside the CEC above the card slot by pulling the latch toward the rear of the CEC enclosure.
2. Lift the card out of the slot.
Figure 16. Removing a PCI adapter
Remove the RS-485 serial interface card (P1-C5). See Figure 16 and Figure 15.
1. Unlock the blue latch by pushing down on the blue tab behind the CEC enclosure. Then outside the CEC above the card slot by pulling the latch toward the rear of the CEC enclosure.
2. Lift the card out of the slot.
Remove the Ethernet four-port 1 Gb copper card (P1-C2). See Figure 17 and Figure 15.
1. Unlock the blue latch above the card slot by pulling the latch toward the rear of the CEC enclosure.
2. Lift the card out of the slot.
Figure 17. Removing a host Ethernet adapter
Remove the I2C passive connector card (P1-C1-C1). See Figure 18 and Figure 15.
1. Lift the card out of the slot.
2. Release the ribbon cable fully from the card connector and from the vertical retention slot .
Figure 18. Removing the I2C passive connector card
Remove the control panel. See Figure 19.
1. Press the blue release tab to the left and pull the control panel out to the service position.
2. Remove the control panel by pressing the locking tabs located on either side of the panel, grasping the edges of the panel, and pulling the panel out of its bay.
3. Disconnect the control-panel signal cable and its related USB cable from the back of the control panel.
Figure 19. Removing the control panel
Remove the I2C interface card (P1-C19).
1. The I2C interface card is to the right of the memory cards. See Figure 20.
2. This FRU has five cable ends. See Figure 21. Trace each cable to its destination and disconnect it from that connector.
  - , control panel USB and , control panel signal cables were already disconnected in a prior step.
  - , was already released from I2C passive card in a prior step.
  - , release it from the system backplane. See Figure 22, Control Panel Signal.
  - , release it from the system backplane. See Figure 22, Control Panel USB.
3. Press the blue release latch and lift the card out of the slot. See Figure 20.
Figure 20. Removing the I2C interface card

Figure 21. I2C interface card cables

Figure 22. Disconnecting the internal cables
Remove all installed voltage regulator modules (P1-C9, P1-C12). See Figure 23.
1. Unlock the card latches , lift them into the open position, and then lift the card out of the slot.
Figure 23. Removing a voltage regulator module
Remove both middle fans. See Figure 24.
1. Squeeze the latches , then lift the fan out of the fan cage.
Note: Figure 24 is a generic graphic that shows the service access cover in place.

Figure 24. Removing the middle fans
At the rear of the CEC enclosure, remove both power supplies. See Figure 25.
1. Press the locking lever down, use the handle to pull the power supply out of the CEC enclosure.
CAUTION:
This part or unit is heavy, but has a weight smaller than 18 kilograms (39.7 pounds). Use care when lifting, removing, or installing this part or unit.

Figure 25. Removing the power supply, rear view
Remove the SPCN Y-cable. See Figure 26.
1. Disconnect the SPCN Y-cable from the system backplane.
2. Remove the SPCN Y-cable from the rear of the CEC enclosure. Remove the four hex head nut standoffs using a 5 mm socket.
Figure 26. Disconnecting the internal cables
Remove the disk drive backplane. See Figure 27.
1. Grasp the disk drive backplane blue latches and pull them outward.
2. Grasp the handles and pull the disk drive backplane toward you.
Figure 27. Removing the disk drive backplane
Remove the PCI-riser air divider. See Figure 28.
1. Firmly grasp the PCI-riser air divider and lift it upward.
Figure 28. Removing the PCI-riser air divider
Remove the disk-drive cage shield and voltage regulator guide and air divider . See Figure 29.
1. Remove the two screws that secure the disk-drive cage shield and remove it.
2. Remove the three screws that secure the voltage regulator guide and air divider and remove it.
Figure 29. Removing the disk-drive cage shield
Remove the memory module cage. See Figure 30.
1. Remove the four screws that secure the memory module cage (View A) and then lift it upwards.
Figure 30. Removing the DIMM cage
Disconnect the front fan cable from the system backplane. See Figure 31.
Figure 31. Disconnecting the front fan cable
Remove the middle fan cage. See Figure 32.
1. Remove the two left screws , two middle bottom screws , and two right bottom screws (above the power supplies).
2. Remove the fan cage by lifting it upward.
Figure 32. Removing the middle fan cage
Locate the processor module tool kit. It should be in the carton received with the new system backplane. See Figure 33.
Figure 33. Processor module tool kit
Remove the processor heat sink. See Figure 34.
1. Guide the hex driver tool down into the heat sink and engage it in the actuation screw. The top of the screw is rounded, so getting the tool into the hex hole can take some time.
2. Loosen the heat sink actuation screw by turning the hex driver (supplied) counterclockwise . The screw will break free with a noise, so be ready for that.
3. Loosen the screw until the load frame arms are disengaged from the heat sink.
4. Grip the heat sink by the grooves on opposing sides and remove the heat sink by lifting upwards. Set the heat sink aside with the module side facing upward.
  Note: If you plan to remove dust or debris from the heat sink, this operation must be performed in another room that is more than 7.6 m (meter) away from the work area.
Figure 34. Removing the heat sink
Clean any dust around the processor module using an air bulb. You must wait for any dust to settle before moving to the next step. See Figure 35.
Figure 35. Dusting the processor area
Remove the processor module. See Figure 36.
1. Press and hold the vacuum pen button and place it in the center of the processor module, then release the vacuum pen button. Releasing the vacuum pen button creates suction.
2. Remove the processor module by lifting upward.
3. Use your other hand to grip the processor by the sides to ensure it does not fall from the vacuum pen and damage the socket pins.
4. While gripping the processor module by the sides, release the vacuum from the pen by pushing the button . Place the processor module lid-side (aluminum side) down on your static-free work surface.
  Note: Inspect the processor socket for debris. If debris is present, use the air pump to gently clean from the center and move outward. Do not touch the processor socket with your fingers, a brush, or the end of the air pump.
Figure 36. Removing the system processor modules
Remove the metal guide bracket for the voltage regulator module.
1. Locate the voltage regulator module guide bracket which is against the left sidewall. See Figure 37
2. Remove the three screws from the outside of the CEC enclosure, then remove the bracket. See Figure 38.
  Figure 37. The voltage regulator module guide bracket screws, internal view
  
  Figure 38. Removing the voltage regulator module guide bracket external screws
Remove the VPD card. See Figure 39.
1. Press on the handle to unlock the VPD card from its slot on the system backplane and pull it up out of its slot.
Figure 39. Removing the VPD card
Remove the service access cover power interlock switch. (Figure 40)
1. Pull the blue latch to the left .
2. Push the power interlock switch towards the rear until the keyhole slots come free of the mounting studs .
3. Unplug the power interlock switch cable from the system backplane .
Figure 40. Service access cover power interlock switch
Remove the system backplane.
Note: The system backplane is a heavy assembly that includes a protective cover beneath it.
1. Remove only the four hex and slot combination screws . See Figure 41.
  Note: Do not remove any of the Torx screws.
2. Removing the system backplane takes three separate movements:
  1. A partial lift
  2. A slight pull towards the front of the CEC
  3. A full lift at the rear of the system backplane to remove it from the CEC enclosure
3. First movement. Gently grip the system backplane by both heat-sink load arms . See Figure 42. Be aware that the heat-sink load arms can come loose, so do not lift by only one load arm. Lift the front of the system backplane up to clear the front alignment pins approximately 6.35 mm (1/4 in.). See Figure 42.
  Note: Use care when lifting the system backplane. Do not lift the system backplane by any of the attached logic modules.
4. Second movement. Slide the system backplane slightly toward the front of the CEC enclosure so the three LEDS and two SPCN connectors clear the CEC enclosure rear vertical bulkhead cutouts.
5. Third movement. After the LEDs and connectors are clear of the chassis, lift the rear of the system backplane and remove the system backplane at an angle. As soon as there is room, slip your fingers around and underneath the backplane to support the weight.
Figure 41. Removing the system backplane

Figure 42. Removing the system backplane, continued

Install the CEC enclosure system backplane

Procedure

Install the system backplane. See Figure 43 and Figure 44.
1. Carefully grasp the replacement system backplane by both of the heat-sink load arms .
2. Lower the system backplane at an angle toward the front of the system chassis.
3. Lower the rear of the system backplane, and then slide it toward the rear of the CEC enclosure until the three LEDs and two SPCN connectors clear the openings in the CEC enclosure rear vertical bulkhead cutouts (see inset).
4. Lower the front of the system backplane onto the alignment pins .
5. Tighten the four screws hat secure the system backplane to the system chassis.
Figure 43. Installing the system backplane

Figure 44. Installing the system backplane, continued
Install the metal guide bracket for the voltage regulator module on the inside of the CEC enclosure left sidewall. See Figure 37 and Figure 38.
1. Align the three holes on the bracket to the three holes along the system sidewall and then install the three screws.
Remove the processor socket black protective cover only for the processor you will install.
1. An unused socket should always have the cover installed.
2. Install the removed cover(s) on the FRU being returned.
Install the processor module.
Note: If you have only one processor module, it goes in the P1-C11 (rightmost) socket. (Figure 15)
1. Fully press and hold the vacuum pen button and place it in the center of the processor module, then release the vacuum pen button. Releasing the vacuum pen button creates suction. Lift the processor module upward. See Figure 45.
  Note: Grip the processor module by the sides with your other hand to ensure it does not come loose from the vacuum pen.
2. Inspect the bottom of the processor module for any visible damage or debris. If debris is present, you can use the air pump to remove it. See Figure 46.
  Note: Do not touch or use a brush on the processor module.
3. Lower the system processor modules on to the board using the two keyed notches on the processor module and two keyed corners on the processor socket for alignment. Release the vacuum from the pen by pushing the button . See Figure 47.
4. Ensure that the processor module is fully seated by pressing firmly with your finger.
Figure 45. Removing the system processor modules from the packaging

Figure 46. Removing debris from the system processor modules

Figure 47. Installing the system processor modules
Inspect the thermal interface material (TIM) for visible signs of damage. The expectation is that when the heat sink is removed from the failed processor module, the TIM is attached to the heat sink. Unless damaged, the TIM attached to the heat sink can be reused. See Figure 48.
Note: Replacing the TIM is optional and is only performed when there is damage. Do not reuse the removed heat sink with TIM if it has damage. Either discard the heat sink and damaged TIM locally or return to IBM® based on part-order-form part status.

Figure 48. Inspecting the thermal interface material
If damaged, replace the thermal interface material (TIM) and heat sink. See Figure 49.
1. If TIM or heat sink replacement is necessary, order part number 74Y7420, Heat sink and Indium (TIM).
2. Remove the clear film from the thermal interface material packaging.
  Note: The thermal interface material must remain flat. Small wrinkles are acceptable, but folds are not acceptable.
3. Lightly grip the thermal interface material by the edges and center it on to the processor module with the red stripe facing up.
Figure 49. Installing the TIM onto the processor lid
Install the heat sink. Read this entire step before proceeding:
1. With the heat sink outside the CEC enclosure, insert the hex driver tool into the heat sink center load screw. This is easy because you can see the tool and screw head.
2. Lower the heat sink with tool inserted onto the processor housing using the guide holes on the heat sink to align properly with the guide pins . See Figure 50.
3. When the heat sink makes contact with the processor housing it also makes contact with a lever connected to each load arm D . See Figure 50.
4. Both load arms should pivot in towards each other causing them to engage the horizontal shaft on each side of the heat sink.
5. As you continue to turn the heat sink center load screw with the load arms engaged, the heat sink is pulled firmly into contact with the top of the processor module.
  Figure 50. Installing the heat sink
6. Tighten the center load screw clockwise using the hex driver (supplied) until a firm stop is reached. The firm stop occurs when the screw reaches the bottom of the hole.
7. Hold the top of the heat sink and try to gently move it side to side. See Figure 51.
  - If the heat sink moves noticeably, then the load arms are not engaged and the processor will overheat. Unscrew the center load screw and try this step again. If it fails again, you will need to manually push the load arms in while you turn the center load screw. If you are working alone you can carefully latch one load arm at a time. If you have an assistant, they can use their fingers to push the load arms in while you tighten the load screw.
    Note: To allow access to the loads arms you may need to remove memory cards and a CEC enclosure middle fan.
  - If the heat sink does not move, continue this step.
  Figure 51. Tightening the heat sink center load screw
Install the middle fan cage. See Figure 52.
1. Lower the fan cage into position ensuring that right side alignment groove and alignment pin are engaged.
2. Install the two left screws D , two middle bottom screws , and two right bottom screws (above the power supplies).
Figure 52. Installing the fan cage
Connect the front fan cable to the system backplane. See Figure 31.
Install the memory module cage. See Figure 30. Lower the cage into position, and then install the four screws. (View A).
Install the disk-drive cage shield and voltage regulator guide/air divider . See Figure 29.
1. Lower the disk drive cage shield into position and install the two screws.
2. Lower the voltage regulator guide/air divider into position and install the three screws.
Install the PCI-riser air divider. See Figure 28. Lower the PCI-riser air divider and press it into place. Ensure the tab at the rear bottom fits in the slot.
Install the disk drive cage. See Figure 27. With the disk drive latches extended, push the disk drive cage into the system, and then close the latches until they lock.
Connect the internal SPCN Y-cable to the system backplane and CEC enclosure rear vertical bulkhead cutouts. See Figure 26.
1. Connect the SPCN Y-cable to the system backplane. The connector is keyed to the socket to ensure it is oriented properly.
2. Install the SPCN 1 cable in the UPPER opening with two threaded hex nut standoffs. Ensure the SPCN 1 cable label matches the SPCN 1 opening rear label.
3. Install the SPCN 2 cable in the LOWER opening with two threaded hex nut standoffs. Ensure the SPCN 1 cable label matches the SPCN 1 opening rear label.
Install the power supplies. See Figure 25. Push each power supply in until the orange latch locks in place.
CAUTION:
This part or unit is heavy, but has a weight smaller than 18 kilograms (39.7 pounds). Use care when lifting, removing, or installing this part or unit.
Install the middle fans. See Figure 24.
1. Orient the fan so the airflow arrow on the top is pointing to the rear of the CEC enclosure.
2. Lower the fan into the fan cage and push down until it locks into place.
Install the voltage regulator modules. See Figure 23.
1. Lift the card latches into the open position, lower the module into the slot, and then close the card latches until they snap into place.
2. Lower the card into the slot and then push the latches down fully.
Install the I2C interface card (P1-C19).
1. Install the card into its slot. Push down until the blue latch snaps into place. See Figure 20.
2. Route the control panel cable bundle through the control panel opening so that the cables connectors stick out the front of the CEC enclosure. See Figure 21.
3. Connect the control panel USB cable Figure 21 to the system backplane (Figure 22).
4. Connect the control panel signal cable Figure 21 to the control panel USB connector (Figure 22) on the system backplane.
  Note: Ensure the blue color band on the cable and the connector are on the same side. It is possible to install the ribbon cable backwards.
5. Route the I2C cable Figure 21 to the I2C passive card location at the right rear of the CEC enclosure (Figure 18).
Install the I2C passive connector card. See Figure 18.
1. Insert the ribbon cable into the card connector . Ensure the cable passes through the two vertical slots in the card.
  Note: Ensure the blue color band on the cable and the connector are on the same side. It is possible to install the ribbon cable backwards.
2. Ensure the cable passes through the two vertical slots in the card.
3. Install the card into the slot.
Install the control panel. See Figure 19.
1. Connect the control-panel signal cable and its related USB cable to the rear of the control panel.
2. Install the control panel assembly by sliding it into the CEC enclosure until the locking tabs located on either side of the panel snap into place.
3. Slide the control panel fully into the CEC enclosure until the blue latch snaps into place.
Install the Ethernet four-port 1 Gb copper card (P1-C2). See Figure 17.
1. Align the adapter with the connector. Ensure that the hook on the tail stock of the adapter slips into the slot on the rear of the system.
2. Insert the adapter firmly into the connector and rotate the card latch into place.
Install the PCIe single-port cards (P1-C3, P1-C4). See Figure 16. Carefully grasp the card by its tailstock , press it firmly into the slot, and rotate the card latch into place.
Install the RS-485 serial interface card (P1-C5). See Figure 16. Carefully grasp the card by its tailstock , press it firmly into the slot, and rotate the card latch into place.
Install the PCIe three-port cards (P1-C1, P1-C8) if removed. See Figure 14. Lift the card latches into the open position, lower the card into the slot, and then close the card latches until they snap into place.
Install the memory cards and memory card air baffles (if present). See Figure 13.
Note: If you only have one memory card, it goes in the P1-C18 slot. See Figure 15.
1. The memory card memory modules must face to the right. See Figure 53.
2. Lift the card latches into the open position, lower the memory card into the slot, and then close the card latches until they snap into place.
  Note: If the memory card memory modules face to the left, the card may feel properly installed, but it will not be seated in the system planar connector. SeeFigure 53.
  
  Figure 53. Correct orientation to install memory card
Install the service access cover power interlock switch. (Figure 2)
1. Connect the power interlock switch cable to the the system backplane .
2. Align the power interlock switch on the mounting studs. You will need to keep it pushed against the right sidewall.
3. Pull the power interlock switch towards the front until the blue latch snaps into place.
Install the VPD card. See Figure 39.
Ensure the new system planar has a time-of-day battery installed next to the VPD card. See Figure 54.
1. If a battery is not present, order and install a new battery. If your service window is short, use the battery from the old system planar and then later schedule a time to install a new battery.
2. Insert the time-of-day battery in the slot on the system backplane, being sure to insert the battery with the polarity (+/-) the same as the battery that was removed.
Figure 54. Installing the time-of-day battery
Install the service access cover. See Figure 12.
1. Place the service access cover on top of the system, about 25 mm (1 in.) from the upper chassis ledge.
2. Hold the service access cover against the system unit and slide it toward the front of the system. The tabs of the service access cover slide beneath the upper chassis ledge.
3. Align the two thumbscrews located on the back of the service access cover with the two holes on the back of the system chassis.
4. Tighten the thumbscrews to secure the service access cover.
Install the front cover. See Figure 1.
Push the CEC enclosure in until it is sticking out of the rack about 20 centimeters (8 inches). This will allow room to reconnect the cable management arm at the rear. See Figure 55
1. Unlock the blue rail safety latches by lifting them upward. The rail safety latches are located near the middle of the CEC enclosure.
2. Be careful to not pinch your fingers when you begin to slide the CEC enclosure in.
Figure 55. Placing the CEC enclosure in the operating position
At the rear of the CEC enclosure, reconnect the cable management arm to the CEC bracket on the slide rail. Ensure the blue latch pin snaps closed.
Ensure the CEC cable bundle is still pulled back over the top of the cable management arm so they will not be damaged when the CEC enclosure is pushed fully into the rack. See Figure 10.
Push the CEC enclosure fully into the rack until it latches in place.
Install the screws that fasten the CEC enclosure in place.
DO NOT CONNECT the two power cables until directed.
Install the filler plugs into serial ports S1 and S2 (P1-T1 and P1-T2) at the rear of the CEC enclosure. See Figure 56.
Connect all rear cables except the two power cables. For location codes see, Figure 56.
Figure 56. Location codes for the CEC enclosure (rear view) (Model 961)
Connect the power cables (E1-J1, E2-J1) to both CEC enclosure power supplies. See Figure 57.
Note: The power supply "DC Good" green LED should blink. See Figure 3.
1. Loop the power cable around the power supply handle and connect it.
2. Secure the cable with the cable tie.
Is the DC Good green LED blinking on one or both power supplies?
- Yes, go to the next step.
- No, ensure the power cables are properly connected. If no cable problem is found, call the next level of support.
Figure 57. CEC enclosure power supply cable loops
Wait up to 5 minutes for the CEC enclosure control panel green power present LED to blink slowly, as shown in Figure 5.
Note: This ensures the CEC enclosure is in the power-off state.

Is the green LED blinking?
- Yes, go to the next step.
- No, ensure the CEC enclosure power supplies are fully seated. The possible failing FRUs are the CEC enclosure system backplane, I2C interface card and cables, and control panel. You can also call the next level of support.
Return the management console laptop to the standard service position on the slide-out tray. See Figure 1.
1. Slide the empty management console tray out to the service position.
2. Move the laptop assembly from the DC-UPS service position to the standard service position . Carefully route the cable bundle.
3. Push the DC-UPS service position rails fully in.
Exit this service information center parts exchange procedure and return to the procedure that sent you here.