I hooked up to vehicle and got error message something about mount with something. Then kept going to power down cancel page. Battery was low so I charged battery with unit off and kept coming on by itself and charged until green light came on. I was sleeping and heard it beeping and screen flickering so I removed the battery and battery by the way said low. So I bought a new battery from snap on and am charging it keeps coming on by itself error warning power down confirm cancel. I don't use often. It will still work on car without battery installed. I think it is possessed. Anyone ever have this problem? Thanks.