Clients manually booted to PXE are failing to PXE boot with the following error:
PXE-E35: TFTP read timeout. Next TFTP data packet was not received.
Cause
PXE is improperly configured to only service clients with active job assignments. Thus when the client boots and there is no assigned job, PXE does not service the client.
Resolution
In the PXE Configuration Utility, go to the DS tab and uncheck the Enable response to computers with active job assignments only option