Starview super re-setting every 30 mins

I have a starview 3 super but i am getting the problem of it kind of rebooting every 30 mins at night time or if its been on a while. It also does it more often if ive got the radio stations on.

Any ideas for this problem or could it just be a simple plug fuse problem i.e does it need to be a 13A plug top fuse because im using the one thats in and i think its only a 5amp

I also have a mate who's is doing the same any help would be greatfull