Powering Up issues

[borderbasser]

took the boat out for the first time in three months today and couldn't get the fish finders to power up. I have two Eagle units and neither would work on any of the power sources.  The batteries are fully charged and I'm really miffed why they are not powering up. Any help would be appreciated.

[Bassinkorea]

Did you check the battery connections and fuses?

[borderbasser]

good point
and I have not checked those yet...

[-Bryan-]

Check every connection for corrosion, even the ends of the fuses.  I would also suggest checking the grounds.