Hi @dabear20549
What indication is there on the screen when you just try to charge the battery?
Does it get to 100%. (even when on charge for a few hours)?
If not, perhaps the battery is failing (or has failed) and the tablet won't start on the battery or when connected to the charger as the charger can't do both i.e. charge the battery and operate the tablet at the same time.
If it is determined that the battery is the problem then here's the ifixit [guide|37860] guide that may help.