... tested 2 time by 2 different technician before shipping.We focus on the excellent quality because we want to get praise and ... , such as turps, dust, tin soldering or other dirty mark on board.2)check whether lack of electronic insulation gummed paper ... and external connector of LCD display , Two memory, DVD driver, Network connection, Voice, Mouse,Keyboard, Dial, USB, SD connector, PC, 3 ...