Humminbird 787c2 Combo GPS Receiver "hummingbird lcr" Questions

...HUMMINGBIRD DEPTH SOUNDER LCR-3D . WAS WORKING FINE WHEN I PUT IT AWAY, NOW WONT POWER UP. HAVE CHECKED THE INPUT POWER AND IT IS OKAY. I DO NOT SEE A FUSE IN THE UNIT. ITEM IS OLDER UNIT BUT IS ...