According to your description, I suggest you refer to the following information:
I suggest you find a regular original system installation CD, and set the CD boot according to the following methods to see if the machine can boot into the system installation interface. If you can't enter the system installation interface, it is recommended that you contact the local gold medal service center as soon as possible for testing and processing. There may be a problem with the CD hardware:
① Restore the BIOS default value of the machine, put the installation CD into the CD-ROM drive, and restart the computer.
② When the "HP/COMPAQ" sign appears on the screen, click the "F9" key continuously.
③ Select "Built-in CD/DVD ROM Drive" and press Enter to confirm.
You can check the nearest HP Gold Service Center through the following website:
/zh/support-drivers/e support/as CPPS . html
I hope the above reply can help you.
If the above information can't solve your problem, you can log on to www.hp.com.cn/chat,, the online chat room of HP Network, and ask an online engineer to help you solve the problem further. More product information is available in www.hp.com.cn/800..