@massey188 check the power to the GPS. Make sure that it is properly connected to an external power source. After that, you want to use [[Topic:Garmin Dezl 770LMT|these guides]] to work on it. Check the charging/power port and make sure that ti is properly connected and has power going to it. Check the motherboard for any obvious damaged or missing parts. Post some images of what you see with your question. [guide|21499] That way we can see what you see and can try to assist you further if needed.