iMac 17″, 20″, 24″ Intel / G5 (iSight) Power Button $7.50 Power Button Assy iMac 17", 20", 24" Intel / G5 (iSight) Power Button quantity Add to cart Add to Quote Continue Shopping Categories: A1144 iMac G5 17", A1145 iMac G5 20", 2006 (17" White iMac), 2006 (20" White iMac), 2006 (24" White iMac) Description Apple 593-0156. Power Button for white iMacs from the G5 (iSight) through Intel Late 2006. This concave button is on the lower left of the rear housing. Compatibility isn’t guaranteed, check the part number on the cable. Cable is approx 4″ long.