Recap the logic board, the issues your talking about start there. Even if the logic board doesn't look a mess it is. I promise. If you count the threads youll see they are mostly bad caps over and over. Start with logic board, then to analog if needed. A lot of people here do repairs on their own or send it to people on the list. Im 50/50. I just cant see well enough to do small things so I send away for help.