1: "Please disassemble your motherboard to find the part number for comparison with the listing, rather than relying solely on the laptop model. This is because the same laptop model may have differences between DIS and UMA, as well as AMD."2：Our motherboards undergo a comprehensive functional test before delivery. If you encounter any issues with the test, it may be due to problems with peripheral parts or damage during transportation. Please feel free to send message through the site before opening a dispute. We will offer professional guidance on installation and testing of the motherboard, as well as satisfactory solutions.3: For buyers in the US, if a return is necessary, we will provide a USPS or UPS return label for shipment to a US address. For other countries, we will actively coordinate return logistics to facilitate shipment back to China.4: If you are unable to locate the motherboard model, please feel free to consult with us. This will help you avoid purchasing errors and incompatible motherboards. Our usual response time is within 12 hours.Thank you for taking the time to read through our description ！