Hi,
The trick that works for me is: REMOVE THE PLASTIC SCREEN PROTECTOR! The rest of this post, no need to read unless you are happy to read about the moment when my Samsung S4 gave me a near depression experience. Simply sharing the woes when techno hits me - a dumb user. LOL!
I am sharing my luck here. In fact, I am just an ordinary, mature aged non-techno savvy user of an android phone. This morning, I woke up and my Samsung S4 wouldn't want to 'greet' me. It had chosen to 'sleep on' and it annoyed the crap out of me. I heard myself cursing under my breath! I pressed everything on the screen hoping to wake it up from what looked like a 'hangover' from the weekend of perhaps over-use. It was already sluggish over the weekend, slow to respond to the numeric touch screen to open up the phone with the password. I thought, OMG - there goes, my baby! Early this morning, I read a few forum discussions and a few said when a phone behaves this way, 'it's a gonna'. Put it to rest or go and get a new screen. I had never dropped the phone once or cause any water/moisture damage. But my S4 just turned 2 years old and, therefore, no more warranty claim,
I had so wanted to 'strangle' it or even abuse it - like pressing its 'face' till it bruises. It got me worried that it had driven me to such a point of even considering abusing it - so not like me! I also fear toxic LED or whatever stuff that makes the screen face squishy might ooze out! So I spared it the cruelty. Instead, I used a damp soft computer screen cloth and gently cleaned the screen. It kind of started to flicker a bit intermittently. Then it went all black again. My heart sank. So I thought, if it is going to die on me, I might as well experiment with a few things before I bin it. By this time, I was willing to be a quack surgeon a step at a time...
My screen had a protective screen which is a bit sticky or yucky from overuse. Then I had a lightbulb moment. It went from intermittently black screen to a split second respond after I cleaned it gently. I thought if it responds briefly to cleaning the protective screen, why not I totally remove the worn protective plastic? So I gently peel it off and started to press my PIN. You guessed it - bingo, it responded to my first push but it a little less speed to react as if recovering from a daze. Then it responded to all my PIN pushes and another bingo moment! It allowed me to enter into our interactive little world that I have become so attached to that I don't think I ever know how to live without it. First thing immediately was to transfer all my contact numbers manually into a notebook - good old fashion way for fear of never ever to retrieve it again! Next I transfer all my pictures into a portable storage gadget - the USB stick. So yes, I am sharing the 'pot luck' here where I strike lucky today! Can't guarantee this works for everybody's phone - but worth a try.