@edubba123 there is no standard part that needs to be replaced. It will depend on your boards to see what has failed. Use [[Topic:GoPro Hero 3Plus Silver Edition|these guides]] to work on your GoPro and take plenty of images. Post those with your question so we can see what you see. Use [guide|21499|this guide] for that. One of the parts you definitely will have to change is the battery.