Does your tablet works if your battery is fully drained and your charger is plugged in? (= Does your tablet still works without charging and without using your battery?)
If so: might be a battery problem
If it doesnt work with drained battery
* or your plug isn't working, you can test this by plugging in your charger in another outlet
- or your charger isn't working, you can test this by using another charcher (same type though!)
- or your port isn't working
If you answer me we can figure out a solution together.