Mac Forums

so i put my laptop in my suitcase when i went on a plane and i guess since my suitcase was thrown around my laptop screen is weird
like when i turned on my computer the screen was negative and so i went to universal access and switched from black on white (which should usually look normal) then i switch to white on black which normally looks negative and so it looks a little normal but its still dark and gray!!! help

Try using Techtool it either came with your computer or you can download it off of apple's website in downloads section.
If there is something wrong physically with your screen it will probably suggest what to do.