HP ZBook 15 G5 Base Model Mobile Workstation User Manual download pdf (Page 117)

Helpful Hints

After you become familiar with the general troubleshooting steps above (General troubleshooting steps

on page 87), follow the helpful hints below before running diagnostics and troubleshooting.

At startup

TIP: If you have installed an operating system other than the factory-installed operating system, go to

http://www.hp.com/go/quickspecs and verify that it is supported on your system.

1. Be sure that the computer is plugged into a working AC outlet.

2. Be sure that power is connected to the docking station if a dock is used.

3. Be sure that the AC adapter light is on.

4. Be sure that the AC adapter is connected when you update BIOS to avoid BIOS corruption.

5. Be sure that the computer is turned on, the rear power light is solid white (connected to an external

power source) and the front power light is solid white (normal operation).

6. Remove all optical and ash drives from your system before turning it on.

7. Be sure that the boot option is set to a working operating system drive.

8. Be sure that externally connected monitors are turned on and their power lights are on. Not all monitors

are equipped with lights to indicate their functionality.

9. Turn up the brightness and contrast controls of a display or external display device if the screen is dim.

During operation

1. To wake the computer:

a. Press the power button or any key on the keyboard.

b. If the system remains in the Sleep (Windows), Suspend (Linux), or Hibernate state, shut down the

system by pressing and holding the power button for at least four seconds.

c. If the system does not shut down, unplug the power cord, wait a few seconds, and then plug it in

again. Then press the power button again to restart the system. If it does not turn on, press the

power button to start the computer.

2. Look for blinking lights on the computer. The blinking lights could be error codes that will help diagnose

the problem.

3. Check all cables for loose or incorrect connections (external devices, power cords, dock, etc.).

4. After installing a non-Plug and Play expansion board or other option, recongure the computer. For

example, if you upgrade to a solid-state drive, you may need to recongure the boot order.

5. Be sure that all required device drivers have been installed. For example, if you have connected a printer,

you must install a printer driver.

6. If there is a network connection issue, plug another computer with a dierent cable into the network

connection. There might be a problem with the network plug or cable.

7. If hardware has recently been installed, remove it and determine whether the computer functions

properly.

8. If software has recently been installed, uninstall it and determine whether the computer functions

properly.

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HP ZBook 15 G5 Base Model Mobile Workstation User Manual Page 117