The reason output is useful is it can tell what’s going wrong. It may say, not correct format which would tell us to use a newer or different file. Maybe it’s just not reaching the tftpserver for some reason, in which case it may be saying timeout or cannot load file.
Either way, outout is always useful, even if it isn’t helpful.
That being said, one resource to look at for efi pxe booting could be:
[url]https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s1-netboot-pxe-config-efi.html[/url]
While I don’t know all the possible methods that will get your system actually working, it’s one place to start.