Dear Buyer: Please take more time to carefully compare the detailed pictures of the motherboard. And the operation process of the motherboard test in the detailed description of the baby to avoid some errors. Every motherboard motherboard is fully tested, and the test pictures are sent through the platform's chat window. There are sample pictures below. Note: Please check pictures and description before orderin Motherboard function test process 1. Inspect the appearance of the product, such as oil, dust, tin soldering or other shipboard stains. 2. Check for the absence of electronic insulating tape. 3. Check the case for missing parts, rust, rot and heat dissipation. 4. Check the liquid crystal display, dual memory, DVD drive, network connection, voice, mouse, keyboard, dial, USB, SD connector, PC, 3.3v COMS battery, battery charge and discharge, fully run 3D, restart the system at least 2 times. The company is mainly engaged in notebook computer accessories. The inventory is very large. You are very welcome to add and collect. About the package We will use special static bag with bubble bag wrapped into the box Buyer attention 1. We provide a 45-day warranty in a normal and appropriate manner. 2.Please check the package when you receive it to avoid any damage. If the package is broken, please contact us first. 3. If you encounter some problems in the machine working environment, we will provide you with good technical support, or we suggest you ask you...