mobile

I have a galaxy s3 and it doesn't charge nor open. This first happened last April 10, 2015. The situation was me trying to charge my phone and when i plug the charging port in the dock, it doesn't show any sign like a charging sign or any changes on the battery. I tried to shut the phone down and tried to charge but still there was no change. I searched for solutions to this problem and so I found this solution where you should Remove battery and press power button to drain the capacitors. I did the procedure and finally opened my phone! It also charges and it was somehow a big relief. The following night, i tried to charge my phone again and it wont open and i turned the phone off and tried to do the same procedure but there was no change until now. I still can't open it. Any ideas how?