Hi,
Thanks for posting in Microsoft MECM Q&A forum.
1,The hard disk 3F0 error indicates that your system isn't able to find a boot device. The boot device not found 3F0 error may occur due to various reasons, such as incorrect BIOS boot sequence, hard drive not properly plugged in, a corrupted hard disk partition.
2,Please help review the smspxe.log on the server to see if there is any useful information. Check if the client's MAC address and SMSBIOS is in the ConfigMgr Database and recognized as known computer. And make sure you have deployed a task sequence to the computer.
Hope it helps. Thanks for your time.
Best regards,
Simon
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