HP ProDesk 600 G5 Maintenance and Service Guide - Page 92

Solving USB flash drive problems, If you encounter USB flash drive problems

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Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop after fifth iteration but LEDs continue flashing.) Cause Solution Memory is installed incorrectly or is bad. 1. Reseat DIMMs. Power on the system. 2. Replace DIMMs one at a time to isolate the faulty module. 3. Replace third-party memory with HP memory. 4. Replace the system board. 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. The device was not properly seated before power-up. Solution Run the Computer Setup utility and enable USB ports in Advanced > Port Options. Ensure the device is fully inserted into the USB port before applying power to the system 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 Flash drive is bootable. Flash drive is defective. Solution Install the flash drive only after the operating system boots. Try a different flash drive. 84 Chapter 6 Troubleshooting without diagnostics

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Power LED flashes Red five times, once every second, followed by a two second pause, and the computer beeps five times. (Beeps stop
after fifth iteration but LEDs continue flashing.)
Cause
Solution
Memory is installed incorrectly or is bad.
1.
Reseat DIMMs. Power on the system.
2.
Replace DIMMs one at a time to isolate the faulty module.
3.
Replace third-party memory with HP memory.
4.
Replace the system board.
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
.
The device was not properly seated before power-up.
Ensure the device is fully inserted into the USB port before applying
power to the system
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.
Flash drive is defective.
Try a different flash drive.
84
Chapter 6
Troubleshooting without diagnostics