First, when the HP logo appears on the machine, you usually press F 10 to enter the BIOS. If you are sure that pressing ESC and F 10 can't access the BIOS, I suggest you try to replace the keyboard and clear the COMS of the machine to see if you can solve the problem you encounter. If the problem still exists after removing COMS, it is suggested that you record the serial number of the machine, open the following website, select the product type (desktop computer) to be used, then click the+sign in front of the commercial desktop computer and ThinClient, and then click Select to log in to the chat room, so that they can help you further solve the problem you encounter.

Note: The correct way to clear the 3-pin jumper CMOS is:

1. First, you need to turn off the power (after unplugging the external power cord, press the power switch several times to drain the remaining power). After opening the chassis, you can find a 3-pin jumper next to the SATA interface of the hard disk with the word CMOS next to it.

2. If the current jumper cap is connected with 1-2 pin, please remove the jumper cap and connect it with 2-3 pin (if the current jumper cap is connected with 2-3 pin, remove the jumper cap and connect it with 1-2 pin), wait for 15 seconds, and then put it back in its original position. There is no need to power on during operation.

Secondly, if your machine needs to install win7 system, I suggest that you can find Microsoft's original system to install the CD, and see if you can solve the problems you encounter according to the CD-ROM boot installation method. The CD boot method is as follows:

① Insert the installation CD into the CD-ROM drive, and then restart the computer.

② When the "HP/COMPAQ" sign appears on the screen, click the "F9" key continuously.

③ Select "CD/DVD ROM Drive" and press Enter to confirm.

Note: Due to different models, the interface of CD-ROM boot is slightly different. Please select a representative CD.

④ for the installation process of win 7, please refer to the official Microsoft document:/portal/site/hpsc/public/kb/docdisplay/? docId=emr_na-c03475088

Note: It is not recommended that you install the operating system by Ghost and WINPE, because the system image used in this way will be modified by the manufacturer, and some files may be lost in the modified system, which may be needed by your machine, so there may be problems when you install the system. It is recommended that you try to install the operating system using Microsoft's original system installation CD.

I hope the above reply can help you.