My Jensen vr209tp has an issue. The house batteries died and were replaced, and immediately after the Jensen vr209tp dash radio with cameras is not working properly. The blue "Jensen" screen displays when the radio is turned on and then the radio touchscreen turns blank. The back and side cameras only work when the RV is in reverse (and the contrast is terrible) or using the turn signals. Anyone have any hints on a repair? This is for a Thor 2011 Hurricane 31J. Is their an easy way to get the dash off to check behind?