The whole screen freeze+Can't start up sometime!

I got my macbook pro 13" Unibody for about 1 1/2 years! Dont have any warranty! :(

Here is the problems:

I was using network yesterday, suddenly the mac screen frozen, I try to move the mouse pad or type something on the keyboard, but nothing work! I press the buttom to turn off it after I wait few mintes.

When I turn it on, it can't connect to wifi, it say "No airport card installed" Then I restart it couple time, it still dont work+dont allow me to trun on the airport.

Then I shut down it, then wait for a while and then turn on it. >.< The sleep light in on, but the screen is black! Try to turn it on for couple time, nothing work! Brought it to Apple Store, they said they need to send it back to their head companies to fix it. They cant turn in on either! It will cost $310+ (:( I dont have that much money) aw..... can anyone help me solve the problem??

I try to turn on it today, it work but still saying No airport card installed + after a couple mintes, they whole screen froze! cant move anything! the only thing work is press the buttom to froce it to turn off! HELPPPP!!!!!!

I already try to reinstall the application+Mac OS X! But still nothing work!!!!!

DOES ANYONE KNOWS WHAT WENT WRONG?

OR WHERE CAN I FIX IT FOR A CHEAPER PRICE?