Precision 7510 keyboard stops working when PXE booting

It's getting a little tiring that every new piece of hardware we get has one issue or another.

One of our departments just got in a couple of Precision 7510 laptops as replacements for the M4800 and I was testing the drivers with our SCCM environment. When trying to PXE boot the system it works fine until I get to the point where I have to hit F12 to actually launch the boot.wim then it fails as if I didn't touch the keyboard. 

Updated the BIOS to the latest, no difference. Connected a USB keyboard to it and it worked just fine. Has anyone else seen this issue?