My phone can't turn on even though it was charged

Also known as Huawei Y3 2
Versions:LUA-U22

IT USED TO BE CAUSED BY ME NOT TURNING MY PHONE ON FOR 6 MONTHS FOR CERTAIN REASON, AND WHEN I WANT TO USE IT AGAIN I FOUND MY PHONE CAN'T TURN ON EVEN THOUGH IT WAS CHARGED, BESIDES THAT I HAVE CHANGED A NEW BATTERY AND THE RESULT IS STILL THE SAME NOT WORKING, WILL BUT THE LIGHT ON THE BACK OF MY PHONE IS STILL ON WHEN CHARGING, I THINK MY PHONE HAS EXPERIENCED DAMAGE IN ITS SCREEN PART, ASK FOR YOUR GOOD SERVICE TO GIVE SOME OPINION OR ENLIGHTENMENT ABOUT MY PHONE, I REALLY WANT TO TURN IT ON AGAIN BECAUSE I WANT TO SEE SOMETHING IMPORTANT INSIDE HIS.