No power to graphs 2020 921

[fisherdunn]

I tried to turn my graphs on my 921. The one at the console beeped but didn’t turn on. I had a low battery. Hit it again and did the same thing just a beep. Charged up the battery but now I have nothing not even the beep and my front two units are out as well. Not sure if the front two units were working as I was just trying to check the console unit. Not mechanically inclined at all so please excuse my ignorance. Does this sound like a fuse? They were powering up fine. Where should I look for in the boat for the problem? Any help would be greatly appreciated.

[Tom Edwards]

how long have you had it? check all the connections for corrosion. Fl weather humidity can cause corrosion all over the place.

[fisherdunn]

I’m the original owner. I’ll try and clean the battery posts. Open to all suggestions… thsnks

[Bjxds]

Make sure your battery is charged.
I am assuming your graphs are connected to the fuse block in rod locker. Check fuses and voltage at fuse block, then connections at all graphs.

[Meleagris1]

Sounds like a bad battery, or a bad charger. I would look there first.