more info on acer 24134Mi booting problem?

This is what shows up on the screen when it gets started:

Intel UNDI, PXE 2,0 (build 082)
Copyright (C) 1997-2000 Intel Corporation

For Realtek RTL8139(x)8138/813X PCI Fast Ethernet
PXE-E61: Media test failure, check cable
PXE-M8F: Exiting PXE ROM.
Operating System not found