Power Issues after turning the phone off. AFTER SCREEN REPLACEMENT

Hi!

I jsut replaced the screen on my white Iphone 5S!

The replace went very well and the phone is working fine, until i turn it off.

After i've turned it off, i cant turn it on again unless i disconnect and the connect the battery. This happens pretty much every time, sometimes it works but most of the times i do have to reseat the battery...

The only thing i can think of, is that the grounding sticker that is on the metal plate on the inside of the phone doesnt completely stick onto the plate.