Need help with Broken iPod 4th Generation

I have an iPod 4 will charge obviously because I can tell the battery level increases. Though it will not show as though it's charging. Really weird.... My girlfriend recently gave it to me to try and fix because she thought it was just broke, but the only thing I see is the fact it's not showing it's charging, though it is. When the iPod is dead it DOES show that its charging to be able to turn itself on ( the red battery symbol when charging after it dies ) but other than that, after it turns on, it doesn't say it's charging anymore, yet it is. Also along with this, the iPod will not connect to computer but will charge, along with the problem it's charging but doesn't show it is. My girlfriend sent it back to Apple before and told her that it was dropped in liquid because the indicator in the headphone jack was pink. Yet it's not, its still white as though its never been. So that's not the issue. Any help will be greatly appreciated because this is getting quite annoying. Thank You!

P.S. The iPod was only used for about 6 months before this problem occurred and was just left alone for I think 2 years until recently.

iPod 4th Generation

iOS 6.1.6

32GB