can someone help me?? macbook pro wont start up

[kel2]

well ive had it for about 4 months now and this morning while on it it froze..i waited for a while and nothing so i held onto the power button until it turned off..and now when i try to turn it back on it stays on the white screen with the apple logo..can someone please help!!

 

[spinnerlys]

Have you tried the steps in this guide yet?

Macdoesn't boot