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.)
Memory is installed incorrectly or is bad.
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.
The drive letter after the last physical drive is not available.
USB flash drive not found (identified).
The device is attached to a USB port that has been hidden in
The device was not properly seated before power-up.
System will not boot from USB flash drive.
Boot order is not correct.
Removable Media Boot is disabled in the Computer Setup utility.
The computer boots to DOS after making a bootable flash drive.
Flash drive is bootable.
Flash drive is defective.
Chapter 6 Troubleshooting without diagnostics
Reseat DIMMs. Power on the system.
Replace DIMMs one at a time to isolate the faulty module.
Replace third-party memory with HP memory.
Replace the system board.
Change the default drive letter for the flash drive in Windows.
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
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.
Install the flash drive only after the operating system boots.
Try a different flash drive.