I am trying to find out why some PC's boot and others don't. The ones that don't give me a 53 error, no boot filename received. I can take another PC and plug it into the port that the PC was in that will not boot and that PC will PXE boot. These PC's are different models and the one that doesn't work may be older, but has the PXE option in the BIOS. Could it be that you have to have different boot images on the server? If you do, are these boot images based on the NIC type? If I need to create other boot images how do I create them?