HP Host Computer Z840 Replacement

Prerequisites

Table 5. Safety

POTENTIAL FOR INJURY TO SERVICE PERSONNEL
THE HOST COMPUTER CAN WEIGH IN EXCESS OF 55 POUNDS.
DEPENDING ON YOUR HEIGHT AND ACCESS TO EQUIPMENT REMOVAL/INSTALLATION, LIFTING ASSISTANCE MAY BE REQUIRED. USE YOUR JUDGMENT TO DETERMINE IF LIFT ASSIST OR A SECOND PERSON MAY BE REQUIRED TO ASSIST IN REMOVAL AND INSTALLATION.

TO PREVENT DAMAGE TO COMPONENTS WITHIN THE Z840, OBSERVE THE FOLLOWING ESD PRECAUTIONS:
- WORK ON A STATIC-FREE MAT.
- WEAR A STATIC STRAP TO ENSURE THAT ANY ACCUMULATED ELECTROSTATIC CHARGE IS DISCHARGED FROM YOUR BODY TO GROUND.
- CREATE A COMMON GROUND FOR THE EQUIPMENT YOU ARE WORKING ON BY CONNECTING THE STATIC-FREE MAT, STATIC STRAP AND PERIPHERAL UNITS TO THAT PIECE OF EQUIPMENT.
FOR FURTHER INFORMATION REGARDING ESD PROTECTION, REFER TO THE SAFETY CHAPTER IN THIS PUBLICATION

IN ORDER TO MEET EMC REQUIREMENTS, THE CHASSIS MODULES MUST BE PROPERLY INSTALLED AFTER SERVICING. CHECK THAT THE MODULES ARE MOUNTED FIRMLY IN PLACE AND LOCKED DOWN WHERE APPLICABLE.

FOLLOW ALL REQUIRED SAFETY AND PPE PROCEDURES CUSTOMARY FOR YOUR ORGANIZATION WHEN WORKING ON THIS PRODUCT.

Overview

This procedure shall be followed when replacing the NIO Host Computer (Z840).

Select one of the following methods to Power OFF the Operator Console:
1. If Applications are up, click on the Shut Down button and select Shutdown.
  
  The Operator Console monitor will display a 'Power Down' message when it is acceptable to power OFF the Operator Console.
2. If Applications are down, open a Unix Shell. Type: halt.
Power OFF the console at the front panel switch.
Apply LOTO. See Equipment Service - Lockout-Tagout-PPE procedure.
Remove the front and top covers.

Refer to Replacement > Console > Console Cover Removal and Installation.
Loosen two screw of the rear right cover, and open the rear right cover.

Figure 1. Rear Right Cover
Disconnect the power cable and all cable connectors from the host computer.

Figure 2. Console Rear View
Remove four screw that hold the host computer to the console chassis.
Loosen the set nut, and loosen the lock screw.

Figure 3. Set Nut and Lock Screw

Replace the NIC Card with one from the original host computer according to NIO64 Host Computer (Z840) NIC Card Replacement. Then return to these instructions.

note:
The System Option Licenses are tied to host computer’s Ethernet (eth0) MAC address. The NIC card can be exchanged if one is reasonably certain that the Host Computer failure is not related to the NIC card. This will allow for the reuse of System Option Licenses, otherwise new Licenses must be obtained.

Remove the Recon GPU Card from the old host computer and install it to the new host computer according to Recon GPU Card Replacement.

Attach two handles to the new host computer.
Slide the new host computer into the Operator Console from the front.
Tighten the four screws to secure the host computer to the chassis of console.

note:
Torque each the for (4) 3mm socket cap mounting screws to:

2.3 N-m 1.7 lb-ft 20.4 lb-in 23.5 Kg-cm
Tighten the lock screw to fix the host computer, and tighten the set nut.
Re-Connect the power cable and all cable connectors. Refer to the Host Computer port label attached on the rear cover.
Power ON the Operator Console at the console’s front panel switch.
Verify that the host computer has powered up and is not displaying or sounding any errors.
In order to assure proper operation of the host computer it is necessary to perform software Load from Cold (LFC).
After completing the software LFC, make certain that you perform a final Save System State.

After completing the LFC procedure, perform a complete shutdown of the Operator Console and restart the system.
Reinstall the console covers.