How to Fix System Recovery Repair in Windows 7? (Computer/Laptop) 

I have one problem , i have work on one excel 1997-2003 file and saved on my window 7 desktop.my pc put on sleep mode after some time i hv try to start my pc but its not starting then i hv power off my pc n next day i again try to start my pc but fan spins n off again n again.i hv given my cpu to repair shop they try to repair it but i want to know whether my saved excel file on desktop will be show on desktop after repair of mother board if my pc will boot from my hard drive.my hard drive is healthy. Please guide me