May or may not be related but I had a charging issue too with my Lenovo Tab 2 1051F, was about to give up after a couple months that I was unable to resolve. Luckily I landed on a forum that mentioned to be sure to use only the original charger AND cable that was supplied with the tab. I went on a hunt to find them and sure enough it was charging again and all is well. If you don’t know where you put both just buy a replacement.