iPad 1st Gen not charging
I have this 64GB WiFI-only iPad 1st Gen on its latest iOS (5.1.1), and when I try charging it with a 10w genuine Apple USB adapter that came with my iPad 7 and a cheap knockoff 30-pin cable (as the only two 30-pin cables I own are those) and it comes up the error in the image. I tried cleaning the port, which worked once, but then the error started again. I suspect the iPad does not like the knockoff cable, though it works perfectly on an iPad 3rd gen, several iPhone 4/4S, and an iPod touch 4. So I'm really confused!