I have a problem with my DS. After playing for a short while, console will just shut down. Battery is full, flash cart is not problem (happens with both Acekard and Supercard mini sd). But I suspect that something is wrong with buttons, because Plants vs Zombies, which uses only touch screen works perfectly. I don't want to send it to repairs because it would probably cost less to get another working DS from ebay, so I want to know if I can fix that problem myself. I would open it, but I have no idea what to look for. Any help?