Hang during installation when installing RHEL 7.4 PPC64 LE

Hi everyone. When trying to install 7.3 or 7.4 PPC64 LE on an IBM Power 7 machine. It will hang at the following message. Does anyone know what is going on? 7.3 BE seems to work fine.

elcome to the 64-bit Red Hat Enterprise 7.0 installer!
Loading kernel...

Loading initrd...

OF stdout device is: /vdevice/vty@30000000
Preparing to boot Linux version 3.10.0-514.el7.ppc64le (mockbuild@ppc-028.build.eng.bos.redhat.com) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Wed Oct 19 11:27:06 EDT 2016
Detected machine type: 0000000000000101
Max number of cores passed to firmware: 512 (NR_CPUS = 2048)
Calling ibm,client-architecture-support... done
command line: BOOT_IMAGE=/tftpboot/linuxRHEL7.3le_GA/vmlinuz ip=9.11.220.20::9.11.220.1:255.255.255.0:obi.tuc.stglabs.ibm.com:net0:none nameserver=9.11.227.25 repo=nfs:9.11.194.44:/nim/install/linuxRHEL7.3le_GA ifname=net0:e4:1f:13:51:33:a2 biosdevname=0 inst.vnc
memory layout at init:
memory_limit : 0000000000000000 (16 MB aligned)
alloc_bottom : 000000000c190000
alloc_top : 0000000010000000
alloc_top_hi : 0000000010000000
rmo_top : 0000000010000000
ram_top : 0000000010000000
instantiating rtas at 0x000000000ee20000... done
prom_hold_cpus: skipped
copying OF device tree...
Building dt strings...
Building dt structure...
Device tree strings 0x000000000c1a0000 -> 0x000000000c1a191e
Device tree struct 0x000000000c1b0000 -> 0x000000000c1f0000
Calling quiesce...
returning from prom_init