Lens cap fault?

My JVC digital video camera on start up shows a signe on the screen ( Lens Cap ) when the lens cap is off, In playback or shoot mod the screen is dark and no picture at all, It showes all the correct symbols, Time , shooting mode ect, Its the same when looking through the eye piece Totally blank apart from symbols. Has anyone got a fix for this Lens Cap problem Model GR-DX28EK... Thanks Bob.