Mac book pro 13 inc mid 2012 battery not charging
I recently replace my internal hdd of my macbook pro 13 inc mid 2012. But after a few days later, I have noticed that my battery isn't charging and it stops on 56 %. Another problem is when I connect the power cable to the computer, it's automatically turning on even I properly shut it down.
MacBook Pro, OS X Yosemite (10.10.5)