No. If you have 3 batts and 3 batts are attached to the charger, when plugged in you should at least get a green light if the battery is charged. If 1 bank is not lighting up in any way, it is time to buy a new charger.
Capt. Craig Copeland
2013 Nautic Star 2110 Shallow Bay Boat
Nautic Star Boats Pro Staff (nauticstarboats.com)
Redneck Fish'n Jigs Pro Staff (redneckfishn.com)