Phone doesn't turn on after screen replacement

Hi,

So today I replaced an LCD on a note 5 for a customers phone. It's not my first time doing it I've done a few now. However, this time the phone had been repaired before and the LCD was damaged. The phone was still on and indicated that all it needed was a new screen. The last repairer used a very strong adhesive (stronger than the original stuff). I had alot of trouble removing the back cover, it actually cracked. So I did the whole teardown but when I got to the battery He used the same glue on it and it was impossible to take off without puncturing so I left it on and removed the screen while the battery was still on the midframe.

Now I Just need to finish the repair but when I tested the device before putting all the screws in and closing it up I noticed the phone won't turn on. I plugged in charge and it comes up with the lightning bolt sign but it doesn't advance or indicate any charging. The phone is stuck and it won't boot up.

Any suggestions?

My only idea is that the battery may have gotten damaged when I initially tried to remove it but I've done a lot worse and battery still starts the phone up. But I'm still a noobie.

Please help I'm kind of desperate I would hate to have to pay for a new note 5 I'm already on minimum wage as it is lol

Regards

Typical(Broke)Asian