现在启动不了, 开机显示
Intel UNDI,PXE-2.1 (build 082)
Copyright (C) 1997-2000 Intel Corporation
For Realtek RTL8111B/8111C Gigabit Ethernet Controller v2.13 (071227)
PXE-E61:Media test failure,check cable
PXE-M0F:Exiting PXE ROM.
8206-Reboot and Select proper Boot device
or Insert Boot Media in selected Boot device and press a key