I'm a nube to pools so I could use some help. I've been having off and on problems with my AquaRite SWG. Chlorine suddenly goes low and I couldn't identify why. Canister (t-5) recently cleaned. So the other day when I checked the panel I see no Power and no generating lamp. LCD is active. Tapped the box a couple times and a few seconds later those lights came on. Now they are off steady. Is there any user serviceable parts in this box? Any suggestions on what to check? Do I have any DIY options or do I need to call a service tech? Loose connection? Faulty part? Fuse? Anyone had similar experience and fixed it?