Vmware exsi server booting issue

Hello, It seems that the error message you are getting indicates that your system is trying to boot from a network drive, but it cannot find a valid boot file or operating system.

• You can check to change the boot order in the BIOS settings to prioritize your hard drive.
• You can check to repair the bootloader on your hard drive using a Windows disk and a command prompt.
• You can check to install an operating system on your empty or unformatted hard drive using an installation disk.

please check these two articles 

"PXE-M0F: Exiting Intel PXE ROM Operating system n... - VMware Technology Network VMTN

Boot up sequence fails with error: “Operating System not found” when NICs are removed/added (2151704) (https://dell.to/3R5FK0C)