Object ID: 00000018WIA302AB030GYZ
Topic ID: id_12373866 Version: 1.12
Date: Dec 2, 2019 3:46:57 PM

HP Z420 Lower Level FRU Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	-	As required	30 minutes

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Standard FE Toolkit	1	-	-	-
4 mm Hex Key Wrench	1	-	-	-
ESD Mat and Wrist Strap	1	-	-	-

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
Hard drive	3	hard drive replacement	See FRU manual.	-
DVD drive	1	DVD drive replacement	See FRU manual.	-
Battery, Type 2032 Coin, 3 V, Lithium	1	battery replacement	See FRU manual.	-

Table 4. Required conditions
Condition	Reference	Effectivity
Access to both the front and rear of the operator console is required. Move the console away from walls and remove obstacles in room.	-	-

About this task

Overview

This procedure describes the steps to replace lower level FRUs in the HP Z420 host PC, including:

DVD drive
Hard drive
CMOS battery

Workstation Service Preparation

Procedure

(For hard drive replacement) Ask the customer to archive all images to an external storage device such as a PACS or DVDs.
Perform SaveInfo.
Close any PC applications and power down the GOC.

The GOC supports an optional UPS. Confirm the site’s configuration.
Perform LOTO on the GOC and operator workspace. See the latest revision of the MR Service Safety Manual, PN 5452735, available from the online documentation library.

For added protection, disconnect the twist-n-lock or modular plug main power cable from the rear of the console.
Remove the two screws on the left side panel of the GOC.
Notice

When removing the side panel, avoid straining the ground lead.
Remove the left side panel of the GOC by lifting it up.
Disconnect the short ground lead that connects the side panel to the GOC main chassis at the center of the lead.

CAUTION

Potential system board or component damage!

The cooling fan is off only when the workstation is turned off or the power cable is disconnected. The cooling fan is always on when the workstation is On or in Standby mode.

Disconnect the power cord from the power source before opening the workstation.

Remove all the cables connected to the computer, ensure they are properly labeled, and note their locations for reattachment.

CAUTION

PERSONAL INJURY!

HOST COMPUTER CHASSIS CAN WEIGH IN EXCESS OF 40 POUNDS.

DEPENDING ON YOUR HEIGHT AND ACCESS TO EQUIPMENT FOR REMOVAL AND INSTALLATION, LIFTING ASSISTANCE MAY BE REQUIRED. USE YOUR JUDGMENT TO DETERMINE IF LIFT ASSISTANCE OR A SECOND PERSON IS REQUIRED TO ASSIST IN REMOVAL AND INSTALLATION.

Remove the host computer from the GOC.

Figure 1. Removing Computer from Brackets

Carefully remove the computer using the back and bottom brackets.

Item	Description
1	Remove the two screws securing the back bracket to the GOC.
2	Loosen the two screws on the back slide plate.
3	Slide the plate backward.
4	Loosen the two screws on the side slide plate.
5	Slide the plate in the direction of the arrow.

Notice

Potential component damage

Electrostatic discharge (ESD) can cause permanent damage to electronic components.

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 the ground.
Create a common ground for the equipment being worked on by connecting the static-free mat, static strap, and peripheral units to that piece of equipment.

Notice

For further information regarding ESD protection, see the MR Service Safety Manual, PN 5452735.

Remove the two screws that secure the left side panel to the rear of the PC.

Remove the left side panel of the PC by pulling the latch out, and sliding the cover back. Set the cover aside in a safe location.

DVD Drive Replacement

Procedure

To prevent damage, do not remove the DVD drive from its antistatic packaging until you are ready to install it.
Remove the front panel on the computer by gently unsnapping the plastic locks located on the left side and pulling on the left side of the cover.
1. Pull the cover out just far enough to disengage the locks. If you pull them out too far, you can damage the locks on the right side of the cover.
2. Push the cover slightly to the right as you pull out on the cover.
3. Set the front cover aside in a safe location.
Figure 2. Remove Front Panel

Item Description
1 Release plastic locks
2 Plastic hinges (breakable)
Locate and unplug the power/data cable harness (D4) on the back of the DVD drive.

Figure 3. Power/Data Cable Harness (D4) on Rear of DVD Drive
Pull out the plastic lock located on the left side of the PC and carefully slide out the DVD drive.

Figure 4. Remove DVD Drive

Item Description
1 Plastic lock
2 DVD drive being removed
Remove the guide screws from the old DVD drive and install them on the new unit.
Install the new DVD drive by pulling out on the plastic lock and sliding the new drive into the open slot until it is securely seated.
Reconnect the power/data cable harness to the new DVD drive.
Reinstall the front panel on the PC.
If you are finished replacing FRUs, proceed to Reinstalling Host Computer in GOC.

Item	Description
1	Release plastic locks
2	Plastic hinges (breakable)

Item	Description
1	Plastic lock
2	DVD drive being removed

Hard Drive Replacement

About this task

The HP Z420 has three hard drives.

Item	Description
1	Top slot, power connection D3
2	Middle slot, power connection D2
3	Bottom slot, power connection D1

Procedure

To prevent damage, do not remove the hard drive from its antistatic packaging until you are ready to install it.
Lay the computer on its side to allow for better access.
Remove the power/data cable harness from the hard drive.
Press gently in on the two green tabs on either side of the hard drive and slide the hard drive carrier out of the slot.
Press gently in on the two back tabs of the hard drive carrier and remove it from the slot carrier.

CAUTION

Potential Component Damage!

Oil from your hands can damage the circuitry on the bottom of the drive.

Avoid touching the bottom of the hard drive.

Remove the drive from the carrier by twisting the carrier slightly to disengage the 4 pins holding the hard drive into the carrier.

Remove the new hard drive from its antistatic packaging.
Install the new hard drive into the hard drive carrier. Carefully line up the pins and secure the drive.

Avoid touching the circuitry on the bottom of the hard drive.
Slide the hard drive carrier into the slot carrier until it is firmly seated.
Insert the slot carrier into the drive slot.
Attach the power/data cable harness.

Item	Description
1	Hard drive in slot carrier
2	Hard drive
3	Carrier

Confirm the data cables from all three hard drives are connected to the correct SAS device locations.


Drive Slot	Power	Data	Contents
Top	HDD3	SAS2	Image data
Middle	HDD2	SAS1	Image data
Bottom	HDD1	SAS0	Application software

If you are finished replacing FRUs, proceed to Reinstalling Host Computer in GOC.

CMOS Battery Replacement

Procedure

Lay the workstation on its side with the system board facing up.
Press on the green tabs of the card in slot 4 and remove the card.

Figure 7. Slot 4 Card Removal
Locate the CMOS battery on the HP computer system board.

Figure 8. CMOS Battery Location
Remove the old CMOS battery. Release the CMOS battery from its holder by pulling back on the spring clip. Do NOT put pressure on the holder.

Note:
Two small screwdrivers may be needed – one to push the battery out of the grip, the other to lift the battery up.

Figure 9. CMOS Battery Removal
Let the computer sit for at least 3 minutes to allow the CMOS memory to clear.
Install the new battery. Make sure the spring clip snaps over the battery, holding it in place. The battery’s positive (+) side should be facing upward.
Locate, press and hold the CMOS Reset button for five seconds.
At power-up, make sure to update settings as described in Step 3.

Reinstalling Host Computer in GOC

Procedure

Replace the left side panel of the PC and secure it with the two screws removed earlier.
Return the Z420 host computer to the GOC and replace and secure all cables and covers.
(For CMOS battery replacement) Obtain the GE Equipment Maintenance sticker (part number 5661793) and write the date on the sticker and place the sticker on the GOC for future reference.

Note:
Place the sticker on either side of the GOC, where it can be easily viewed.

Powering on Operator Console

Procedure

Remove LOTO.
Power ON the GOC at the rear of the GOC and then power up the host PC.

IF THE CMOS BATTERY WAS REPLACED, press F10 as soon as the hp invent screen appears. Setup displays at the lower right of the screen. Perform the following steps:

Note:
A message might appear, indicating that system options are not set. Press F1 to continue.

At the language prompt, leave the setting on English or use the arrows to select the language. Press Enter to confirm.
Under File, select Set Time and Date and enter the proper time. Use the Tab key to move the cursor and use the left and right arrow keys to change values.

Restore customized BIOS settings. Leave all HP defaults except for the following:

Table 5. HP Z420 BIOS Changes
Advanced
	VGA Configuration
		Slot 5: Nvidia VGA controller	Primary VGA device
		Slot 2: Nvidia VGA controller	Non-boot device

At the File menu, use the down arrow to highlight Save Changes and Exit and press Enter.
The following message is displayed: Are you sure you want to Save Changes and Exit?
Be sure to press yes to save the settings. The system reboots. BIOS configuration is complete.

Finalization

Procedure

Select from the following table the appropriate actions for Finalization, then proceed to Step 2.


FRU Item Replaced	Actions to be performed
DVD drive	Reboot and confirm DVD and Read/Write images.
Hard drive	Reload software.
CMOS battery	Shut down PC and turn off power Re-apply power and restart PC Verify date/time is correct (CMOS battery is properly retaining date/time)

Reboot and ensure that no memory BIOS errors appear during the boot process.
Run a goodbye scan (check scan)
Verify that all customer functions are operational (auto voice, filming, network, archive).
Reinstall the console front and rear covers.
(For DV25 software or later) Computer hardware replacement may cause a change in the 16-character service license ID code. Renew any site license softkeys that were affected by the hardware replacement.