test the functionality of the part before assembling.while assembling, pay attention to the fragile parts of the connectors.special tools, which can be found in our offer, are required for assembling or disassembling.This is a copy of the original, and the spare part delivered as an OEM may (in rare cases) have minimal variations in functionality, quality or appearance.To find out more about originality, read our blogwhere we focus on originality in more detail. Originality: OEM - Spare part sold as OEM ('Original Equipment Manufacturer') is manufactured to the same standards, specifications and materials as the original. If you have a problem with your Apple MacBook Air 13 A1466 (Mid 2013 - Early 2015) and you need a spare part from the category Spare Parts: I/O PCB Board, you can buy it here. I/O PCB Board for Apple MacBook Air 13 A1466 (Mid 2013 - Early 2015)