Recently I've encountered this issue, my power button frequently double presses..so I'll press it to turn the screen off and it will turn right back on. What can I do to fix this?
We need more info, are you stock, rooted, what version ROM are you on, have you updated ?? the more info we have the better we and others can help.
My phone's been doing this for a couple months. It happens regardless of ROM, and will even occur in recovery so it has to be a hardware issue. I took off the cover at one point and was hitting the button directly, so there's something going on with the switch (or related components).
Been too lazy to take it in. Usually it's not too big of an issue, but occasionally it'll happen 6 times in a row and that gets annoying.