IT Service Specialists can run diagnostics on both Windows & Mac systems to evaluate the issue and determine if it's software or hardware related. 

If deemed a hardware issue, you will need to go to a certified repair location like the Brown University Bookstore Technology Center or the Apple Store (please be advised that they may or may not charge a diagnosis fee depending on the computer's warranty and/or their policy).

Apple Store - Providence Place Mall: https://www.apple.com/retail/providenceplace/

The Brown University Bookstore Technology Center Contact: https://insite.browntextbook.com/SiteText?id=37773

We Fix It: (Screen repair): https://www.yelp.com/biz/we-fix-it-providence-2