The lawsuit covers California and Florida residents that purchased an affected MacBook Pro model between approximately February 2011 and May 2012. According to court documents, the issue stems from a defective AMD GPU that did not function correctly because of lead-free soldering that caused short circuiting among other problems.
MacBook Pro models that were affected by this problem would often have visual banding or malfunctions on the screen, especially when users were performing highly intensive tasks like watching high-resolution videos or using multimedia programs like the Adobe Creative Suite, Final Cut Pro and similar software.