ssv works problem

My ssv works is acting very odd, when I first bought my 800s the stereo worked perfectly, not one problem, then it would only work after you rode it for about 20 mins then it the screen and led light would flash alternately , like it was loosing connection. After this it would come on and work perfectly the whole entire ride. The next time you ride it the same thing again. Now it won’t even come on. The light will come on for a sec and go right back out. I messed with it and it finally come on and stayed on, but very dim, I started the rzr and it got brighter but the stereo still wouldn’t work or charge my iPhone. I’m lost at this point wondering if you guys could help out
Thanks!