Solving Printer Problems; Solving Power Supply Problems; Testing Power Supply - HP Z440 Workstation Series Maintenance And Service Manual

Solving printer problems

Printer does not print.
Printer does not turn on.

Solving power supply problems

This section presents power supply troubleshooting scenarios.

Testing power supply

Before replacing the power supply unit (PSU), use the Built-In Self-Test (BIST) feature to learn if the power
supply still works.
NOTE: Not all PSUs have the BIST functionality. Refer to the Rear panel components section of this
document to determine BIST availability for your workstation.
To test the power supply:
1. Unplug the AC power.
NOTE:
2. Unplug all power cables to the system boards.
3. Plug in AC power and verify the following:
●
If the green BIST LED on the rear of the workstation is illuminated and the fan is spinning, the PSU
is functional.
●
If the green BIST LED is not illuminated or the fan is not spinning, replace the PSU.
See the Rear panel components section of this document to locate the BIST LED on your workstation.
Problem
PSU shuts down intermittently.
Workstation powers off and the
Power LED flashes red 2 times (once
88 Chapter 4 Diagnostics and troubleshooting
Problem
Printer is not turned on and
online.
The correct printer driver for the
application is not installed.
If you are on a network, you
might not have made a
connection to the printer.
Printer might have failed.
The cables might not be
connected properly.
For the HP Z840 Workstation, you must remove the power supply from the chassis.
Cause
Power supply fault.
Processor thermal protection is
activated.
Cause
Turn the printer on and be sure it is online.
1. Install the correct printer driver for the application.
2. Try printing using the MS-DOS command:
DIR C:\> [printer port]
Replace printer port with the address of the printer
used. If the printer works, reload the printer driver.
Make the proper network connection to the printer.
Run printer self-test.
Solution
Replace the PSU.
1. Ensure that the workstation air vents are not blocked.
Solution