No boot prompt on RHEL 7

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I have 2 servers that neither will give me the boot: prompt so I can kickstart them with our configuration. Both are currently running RHEL 7 via manual installs. The other thing they have in common is I am attempting to kickstart these onto an blade IBM xServer LS-22 and an IBM x3550 m3 2U rack server which both have the UEFI startup. I have tried every combination from legacy boot to using the DVD in the Blade Center drive, using the DVD as an external on our crash cart and even USB. These systems are going to be minimal install UEFI as they will end up being Front Tier email servers.

No matter what method or combination--I have tried every possible key combination I could think of--I cannot get to the 'boot: ' prompt. This is going to be a network kickstart using https: These are the only servers I have had issue with--so a ticket is going to be opened at IBM as well.

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Hello

Are these LUKS encrypted partitions? There was a problem with logging messages obscuring the LUKS password prompt. Try pressing Escape or backspace and see if that reveals the prompt.

No. Haven't gotten to encryption except hardware-based for sensitive data. I remember having a similar issue with HP G9 servers and RHEL 6.x. My best guess is because the target hard drive is not over 2 Tb--everyone is assuming a MBR configuration even though I am doing GPT. Just for fun, I am going to try and kickstart one of my desktops this morning and then a VM. Thanks for the idea though.

What I am working on were once old Windows IIS servers now becoming RHEL

There are many Knowledgebase articles if you search for GUID Partition Table. I did not see one mention boot prompt but might be worth a look anyway.

Ugly but Functional results. I interrupted the boot by (e)diting the entries and replacing this:

menuentry 'Install Red Hat Enterprise Linux 7.0' --class fedora --class gnu-linux --class gnu --class os {
        linuxefi /images/pxeboot/vmlinuz inst.stage2=hd:LABEL=RHEL-7.0\x20Server.x86_64 quiet
        initrdefi /images/pxeboot/initrd.img
}

with this:

menuentry 'Install Red Hat Enterprise Linux 7.0' --class fedora --class gnu-linux --class gnu --class os {
        linuxefi /images/pxeboot/vmlinuz inst.stage2=hd:LABEL=RHEL-7.0\x20Server.x86_64 \
          inst.repo=http://172.17.2.51/var/www/html/linux/RedHat/7/x86_64/latest \
          inst.ks=http://172.17.2.51/var/local/kickstart/dft-smtp03.ks \
          ip=172.17.2.140::172.17.2.1:255.255.255.0:DFT-SMTP03::none inst.nameserver=172.17.2.177
        initrdefi /images/pxeboot/initrd.img
}

an letting it boot UEFI. Next is spending some time, when I have free time, with dracut and making this a little cleaner.
Thanks for the help and suggestions--lead me to the 2 articles I used to make this happen.
Anaconda Customization Guide
Anaconda Boot Options-RHEL7 Installation Guide

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