Whenever I turn on my laptop, a screen shows that says:
Intel UNDI, PXE-2.1 (build 082)
Copyright (C) 1997-2000 Intel Corporation
For Atheros PCIE Ethernet Controller v1.0.0.3 912/29/08)
Check cable connection!
PXE-MOF: Exiting Intel PXE ROM
No bootable device -- insert boot disk and press any...