Last week three men filed a class action lawsuit in Northern California District Court alleging that Apple's 2011 MacBook Pro laptops were defective and that Apple did not take proper steps to compensate customers whose hardware broke. The lawsuit specifically addresses 15” and 17” MacBook Pros from 2011, which the plaintiffs claim suffered from “random bouts of graphical distortion, system instability, and system failures.”

The plaintiffs also assert that the problem is widespread, with an online survey conducted by the plaintiffs receiving over 3,000 responses from 2011 MacBook Pro owners in a single week. In the complaint, the plaintiffs blame the solder used to connect the dedicated GPU in the laptops to the main circuit board, saying that the solder was lead-free to comply with EU regulations, and made its way into US products so Apple could save on manufacturing costs.

“Lead-free solder,” the complainants write, “which is typically composed of a combination of tin and silver, suffers from two well-known problems. First, it tends to develop microscopic 'tin whiskers,' which cause short circuiting and other problems within electronic devices. Additionally, lead-free solder tends to crack when exposed to rapid changes in temperature.” The complaint goes on to state that such rapid changes in temperature are caused by the processors themselves heating the inside of the laptop up.

Read the full story at Ars Technica.