We are one of the leading laptop component suppliers in China, specialized in the export of refurbished laptop motherboards, especially be good at HP laptop motherboard, and in a position to supply laptop LCD, laptop keyboard, battery, and adapter. We have our own professional engineer team and repair service for you. With the high quality, good appearance and reasonable price, our customers are from all over the world: North America, South America, Europe, Australia, Africa, Asia. Motherboard test function:1. Check the appearance, such as turps, dust, tin soldering or other dirty mark on board.2. Check whether lack of electronic insulation gummed paper.3. Check whether lacks of fittings, rust, rot, heat elimination chassis.4. Check internal and external connector of LCD display , Two memory, DVD driver, Network connection, Voice, Mouse, Keyboard, Dial, USB, SD connector, PC, 3.3V COMS battery, Battery whether charge and discharge, Full running 3D, Restart system at least two times.