Symptom:
When attempting to UEFI PXE boot ThinkPad notebook systems that have Intel Kabylake chipsets, the PXE process will fail and potentially return PXE-E16 errors.
This document has since been deleted/removed (Reference Lenovo's Document ID: HT503674 - https://support.lenovo.com/us/en/solutions/ht503674 System Is Configured With: UEFI PXE booting Kabylake Chipsets)
You can reference this forum post (PXE Boot error code E16 No Offers Received - Lenovo Community )
This issue has been resolved by Lenovo by updating to the latest BIOS version for these devices. If you run into this the first step would be to confirm you are on the latest BIOS version.
Affected Systems:
T470
T470s
L470
T470p
T570
P51s
X270
X1 Carbon
X1 Carbon Yoga
Yoga 370
P51
P71
L570