To try option one, put the DVD in the drive and then reboot. At some point you should got the message "To boot from DVD press a key...". Press a key and wait for windows setup to start.
The first option will just make sure what the problem is though, it will not fix anything.
The second option will be needed to fix the problem, if its possible.
If you are sure you want to do this I can help talk you through it BUT
1. It WILL void any warranty left
2. It could go wrong, if anything in the laptop is damaged you can do more harm than good
That being said, I want u to understand that it could fix the problem, but it is risky to do if you have no computer knowledge.
Let me know what you want to do, and if you wanna do option two a picture of the bottom of your laptop would really help me out.
Try as detailed as possible, or make several smaller ones with a phone/camera and attach them to your post or if they are to big upload them elsewhere and put the links here. (like Imageshack
Hope to help,