Please help. My previous charger (also a generic) died - so I bought a new (generic) one. The new one does not charge my battery. There is no light whatsoever. BUT, there is a lightening symbol over my battery - so my battery does not die, yet it doesn't charge. Please assist as its annoying that a brand new charger doesn't work properly. Where does the fault lie? Is it software? Hardware? Also I had to replace the motherboard October 2015. I have had the machine for 2 years so out of warranty. I am running on OS X Yosemite 10.10.5. its a 13", 2.5 GHz Intel Core i5, 4 GB 1600 MHz DDR3, Macintosh HD, Intel HD Graphics 4000 1024 MB, MacBook Pro (13-inch, Mid 2012). Thanks a million.