HP Z4 Maintenance and Service Guide - Page 74

Solving USB flash drive problems, Solving front panel component problems

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Solving USB flash drive problems If you encounter USB flash drive problems, common causes and solutions are listed in the following table. USB flash drive is not seen as a drive letter in Windows. Cause The drive letter after the last physical drive is not available. Solution Change the default drive letter for the flash drive in Windows. USB flash drive not found (identified). Cause The device is attached to a USB port that has been hidden in Computer Setup. Solution Run the Computer Setup utility and enable USB ports in Advanced > Port Options. System will not boot from USB flash drive. Cause Boot order is not correct. Removable Media Boot is disabled in the Computer Setup utility. Solution Run the Computer Setup utility and change boot sequence in Advanced > Boot Options. Run the Computer Setup utility and enable booting to removable media in Advanced > Boot Options. Ensure USB is enabled in Storage > Boot Order. The computer boots to DOS after making a bootable flash drive. Cause Solution Flash drive is bootable. Install the flash drive only after the operating system boots. Solving front panel component problems If you encounter problems with devices connected to the front panel, refer to the common causes and solutions listed in the following table. A USB device, headphone, or microphone is not recognized by the computer. Cause Solution Device is not properly connected. 1. Turn off the computer. 2. Reconnect the device to the front of the computer and restart the computer. The device does not have power. If the USB device requires AC power, be sure one end is connected to the device and one end is connected to a live outlet. The correct device driver is not installed. 1. Install the correct driver for the device. 2. You might need to reboot the computer. 66 Chapter 6 Troubleshooting without diagnostics

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Solving USB
flash
drive problems
If you encounter USB
flash
drive problems, common causes and solutions are listed in the following table.
USB
flash
drive is not seen as a drive letter in Windows.
Cause
Solution
The drive letter after the last physical drive is not available.
Change the default drive letter for the
flash
drive in Windows.
USB
flash
drive not found
(identified).
Cause
Solution
The device is attached to a USB port that has been hidden in
Computer Setup.
Run the Computer Setup utility and enable USB ports in
Advanced
>
Port Options
.
System will not boot from USB
flash
drive.
Cause
Solution
Boot order is not correct.
Run the Computer Setup utility and change boot sequence in
Advanced
>
Boot Options
.
Removable Media Boot is disabled in the Computer Setup utility.
Run the Computer Setup utility and enable booting to removable
media in
Advanced
>
Boot Options
. Ensure USB is enabled in
Storage
>
Boot Order
.
The computer boots to DOS after making a bootable
flash
drive.
Cause
Solution
Flash drive is bootable.
Install the
flash
drive only after the operating system boots.
Solving front panel component problems
If you encounter problems with devices connected to the front panel, refer to the common causes and
solutions listed in the following table.
A USB device, headphone, or microphone is not recognized by the computer.
Cause
Solution
Device is not properly connected.
1.
Turn
off
the computer.
2.
Reconnect the device to the front of the computer and
restart the computer.
The device does not have power.
If the USB device requires AC power, be sure one end is connected
to the device and one end is connected to a live outlet.
The correct device driver is not installed.
1.
Install the correct driver for the device.
2.
You might need to reboot the computer.
66
Chapter 6
Troubleshooting without diagnostics