Hi Everyone! New around these parts and in the apple world . I've been a windows/linux IT guy for the better part of a decade. I received this macbook pro from my sister in law after she said the screen was scrambled and didnt want to bother with it and she bought a new one. I couldn't stand to see a computer go to waste so I figured I would look into what it takes to get this thing up an running ! As you can see in the link The screen has a strange yellow plaid background and a flashing folder with a question mark. Previously to this it had a gray screen that was scrambled. The hard drive seems to be spinning and when I opened it up there was no obviously damage(water, burn marks, etc), the battery holds a good charge, and the screen is undamaged. You cannot get passed the current yellow plaid screen. Can any of you tell me what is going on and what I can do? I am very technically capable but I am not sure how serviceable macbooks are from an at home standpoint. Even if I have to take it to an apple store I would like to at least know whats going on out of pure curiosity. Thank you in advance for any help!