Generac 10kw model 0055020. My control panel has no display, completely dark. Generator is working well, but I read it’s easy to replace control panel if wanted (remove four screws, plug and play). I thought I would order the panel and install myself. However, this being the first time I’ve ever worked on my generator and being a repair novice I wondered if I needed to disconnect battery or take any other safety precautions before swapping out control panel? Thanks for any help.