My friend's UV71 (7'' flip out DVD) seems to have a problem. Whenever he gets in the car and turns the headunit on, the volume starts out at 30 no matter what volume it was left at before turning it off. This may not seem like a major problem, but he has 149.Xdb system so it's a tad loud at volume 30. Is there any way to fix this, or is it screwed?