@csurepair You should really start your own thread because the conditions could be different.
Things that we would need to know is the version of FOG you have installed (on or about the cloud on the management home page).
What is your dhcp server?
Is the HP in uefi or bios (legacy) mode?
Since you are getting to the download of bzImage, it probably safe to assume you have the correct iPXE kernel loaded into dhcp option 67.
Are you using dnsmasq in your environment?