The device works either the screen does not show anything

I have heard of a recent common issue with the battery going bad on these tablets, so it is very possible that you simply have to pop off the back, which is held on with very strong clips, lift a few flex cables and swap batteries, but since I am just guessing what your exact issue is, you may also have a damaged charge port. If it feels loose when you plug it in, you may need to replace that instead, which if it is attached to the motherboard, you are going to need soldering work, possible, just higher risk than a battery swap.