Why Samsung tab 4 won't charge with its charger but others work?

Hello everybody. I have a question for you. 2 months ago I bought the Samsung galaxy tab 4 10.1" the tablet has been working great and charging well. Last week I started to experience charging problems. First the tablet started to charge slowly with its original charger and then stopped to charge altogether, though it shows the charging sign. I had to use a blackberry charger that I had and it charges slowly but at least it does. I restored the tablet to original settings so I don't think is a software problem. Also the original charger works well with my Samsung phone so I don't think is broken either. At this point I'm not sure what to do. Don't want to send it to Samsung yet as I need it for work. Any ideas? Thanks!