This method is reliable as it bypasses the operating system, reducing the risk of interruptions.
Unplug the power cable, open the side panel, and press the yellow CMOS button on the motherboard for 5 seconds. Plug it back in and try booting.
Visit the HP Compaq 6000 Pro MT Software and Driver Page to locate the latest BIOS SoftPaq (SPxxxxx).
Select the USB drive, choose the file, and confirm the update.
Restart, enter the boot menu (F9 or F10), and run the update utility. Tips for Success