This Macbook Air was not turning on power rails required for S0 and S4 states because of missing SPI ROM, due to corroded board traces. It is common for people to think they need to replace BGA chipsets which would never fix the problem when in reality, all that's needed is use of brain! We perform these services for regular consumers and other businesses whether you are local or 3000 miles away, and even teach a class on component level motherboard repair! Want to learn from us with a small class size? http://rossmanngroup.com/practical-board-repair-school Local to New York? Come to our store! We offer free estimates on all problems. http://www.rossmanngroup.com/board-repair/ Outside New York? We offer all types of Macbook repairs through our mail-in website, so we can service you even if you live outside of NYC. https://mailin.repair/macbook-logic-board-repair.html Are you a business looking to outsource your board repairs to us? Open a business account with us here to receive wholesale rates on board repairs. http://www.rossmanngroup.com/wholesale