Item has been tested and visually inspected for defects, Please see the listing pictures. If a part is not pictured, then it is not included in the sale. The key function is to provide power, data transfer, and user interface abilities with the computer. We test by checking CPU socket, RAM slots, and the overall board for damage, test the RAM slots and boot the board to BIOS, verify function of I/O ports, and inspect for bulging, damaged, or missing capacitors. All products have passed all tests prior to testing.