My Samsung S4 does not fully boot. It turns off after two seconds after the Samsung screen and before the Cyanogen boot screen. How do I resolve this issue?

I can't boot into recovery -- it never gets that fair. I also can't reflash as the phone turns itself off shortly after it gets to the flash screen. The phone also randomly restarts. I've tried swapping the battery too.

4 Answers 4


This is the infamous power button problem. I had this too. There are some guides that speak of cleaning the power button, but for me I found this rather rough solution to be effective.


Alright guys, so I'm back -- it's 2016/04/25. My S5 just broke so I'm downgrading until it comes in the mail. Googling for the same problem and I found my own answer. This time hitting it hard didn't work. So I sprayed the button liberally with DeoxIT D5 and violla, back in business. Hold the phone button side up and just soak it!

  • 2
    LOL I can't believe that worked
    – timhc22
    Dec 16, 2015 at 9:56

I found the solution. The power button is stuck. Just flick the power button a bunch of times with your finger. If that doesn't work try compressed air, shoot that in there a bit, so it gets unstuck.

If you spilled soda in there maybe try getting an alcohol wipe and try to wipe it down a bit (make sure battery is off) maybe squeeze a very very small amount of rubbing alcohol in there. I mean very small amount, then wipe with Q tip. The flicking technique works for me every time.


Could be dust in there.

Try banging the corner where the power button is, on a hard rubber surface. Be careful not to crack the screen. Remove back of phone and battery first, of course. It worked for me.


I think this might be the power button that got stuck and need replacement.

Here's the link for troubleshooting and solutions. You might need some simple electrical skills. https://www.youtube.com/watch?v=2l_6fwzuIwA

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .