Default Charging Problem

I have read all of the threads about charging problems. I have tried all suggestions. None worked for me. I have found two old 500ma chargers that will actually charge the tablet while off. I wonder why the low powered chargers work but the original charger will not charge my tablet but it will charge other devices just fine. Also I have a couple other 2 amp chargers and it will not accept their charge either. Its as if it rejects the higher amperage. And my question to all is has their been a resolution for the charging problems since the kit Kat update as that is when my charging problem occurred as many others. Thank you to anyone who may be able to assist me. This is my 9 year old child's tablet and I really need to get it fixed.

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