求救！联想开不了机？

开机 就会出现
broadcom base code pxe-2.1 v12.2.5
copyright (c) 2000-2009 broadcom corparation
copyright (c) 1997-2000 inter corporation
all rights reserved
broadcomn undi pxe-2.1V1.1.1
copyright(C)2000-2009 broadcom corporation
copyright(c)1997-2000 inter corporation
PXE-E61 media test failure,check cable
PXE-mif exiting broadcom PXE rom
这两段话不断的重复 开不了机