Hi guys, I find myself faced with a strange problem. A couple of days ago the power supply of my MacBook Pro 15 early 2011, greeted me. Meanwhile I buy another one and I realize immediately that the battery level indicators are no longer responding. Then, starting up and using the Macbook, I realize that the battery charge level does not reach 100%, despite the fact that the battery is not brand new but still working, this adds the annoying problem that within safari in some sites The uppercase letter t is no longer available, while in other sites and applications it works smoothly. In short all the annoying and strange problems that I suggest do a nice SMC reset to solve it all. I turned off the macbook with the power plugged in, I pressed the keystrokes for the reset, that is: Shift + Control + Alt + Power button, but everything stays silent. I disconnected and plugged the battery, but idem. I do not know how to reset and I do not understand what the problem is at the base.