Xperia Z2 :: Won't Turn On - Screen Flashes Up For A Second With Sony Icon Then Cuts Out

I have a sony xperia z2. Last week I had the front screen replaced.
 
last night my phone was on 2% and turned off, i didnt think much of it and when i got into bed put it on charge like i normally would..
 
the screen flashes up for a second or sony with the sony icon but then cuts out and when i have woken up this morning it is still doing this.
 
i have held the volume up button and the power on buttom, but nothing happens it doesn't even vibrate. I have also pressed the red button at the left hand side of the phone but again this doesn't seem to be doing anything.