|I'm pretty sure opening up the laptop is going to void the warrenty.|
A Dell tech told me to open a new Dell once. I told her,"Yeah, that's going to void the warrenty isn't it."
She said "yes"
To which i replied, "Well then why would you tell me to do that?"
She couldn't give an answer.
Don't listen to Tier 1 phone support take it to a shop. The first thing i would check on it if you can is hooking it up to a monitor and seeing if it's just the screen (screen can be replaced).