Hard disk not detected in bios Intel UNDI PXE-2.1 build 083

Hello,
my laptop(Lenovo z5070) while booting says hard disk not detected.....it all happened suddenly ..nothing was wrong with my hard disk as well...the mesage while booting says.......Intel UNDI, PXE-2.1 (build 083)
Copyright (C) 1997-2000 Intel Corporation
This Product is covered by one or more of the following patents:
US6, 570, 884, US6, 115, 776, and US6, 327, 625
Realtek PCIe GBE family Controller Series v2. 57 (08/27/13)
PXE - E61: Media test failure, check cable
PXE-MOF: Exiting PXE ROM.
I have tried every thing..have been to almost each and every forum on internet to search the solution but nothing had been working...
I have tried booting from WINDOWS CD ..tried to go into recovery console and also tried to set up windows but nothing worked it says the same thing no hard disk detected.....
I am really very upset and dont know what to do. Is it my hard drive which has gone...i have also tried resetting the bios option to default...nothing hapened ..also took my hard drive out and again put it in the same place ...again no breakthrough....
PLEASE HELP......THERE WAS MY FAMILY PHOTOGRAPHS AND VIDEO OF MY BROTHER AND HE IS NO MORE NOW. I DONT WANT TO LOOSE THEM.....THANKS IN ADVANCE FOR ANY PAIN TAKEN TO HELP ME OUT