Nothing we can do on the computer until the parts arrive.
As we are going to the next step in resolving the issue and the post being quite long, a refresh would not go amiss.
What is the brand/model of the computer?
What discs do you have? Installation? Recovery? MB driver disc? (picture would be useful)
Your Window version and product code? Should be on a label affixed on the CD, under/back/inside panel of the case.