Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
This sounds like it could be a charger issue, did you purchase a new charger for the ipad as of yet?
It could also be a battery issue.. But lets try this step first and see what happens.
Plug the ipad into your computer to charge.. Wait 5 minutes.. Then, press and hold the sleep wake button and the h ome button at the same time for about 30 seconds..
Does it show anything on screen or does it flicker or anything else?
In that case, it seems you just have a charging issue.. Which is either due to the charger, or due to the battery needing to be replaced.
I would consider a new charger first.. http://amzn.to/2cy4ifW
If that wont charge the ipad then get back to me, and we can discuss replacing the battery which isnt very expensive, but can be a tough process. Its always better to test with a brand new walk charger first.
I strive to provide great service, and greatly appreciate a 5 star rating clicked and submitted when you are satisfied.. I always answer follow up questions.Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.