Why cant my phone turn on

Had a replacement on my iphone 6 lcd today because my screen had ghost touch sometimes, but other than that my phone worked fine. The ghost touch annoys me a lot when it happens tho, so I figured a replacement was a right idea. I was pretty excited to get a to do a screen replacement on my own, and that's all over my head. but right after I dis attach the screen removing all the ribbon cables... I realized that I forget to turn off my phone. Had a bad feeling during the fix, and as I expected, the phone did not turn on after.

I looked for solutions, here is what I tried.

-holding home button and power button for 1 min

-plug charger in from wallplug, plug charger in to computer to see if it can connect to itune to enter dfu mode

- checking for battery

- replace it back to original screen,

-repeat whole process

this happened an hour ago and I am firm to tell you that all hardware in my phone worked fine, but doing all of this above gave no result intoto fixing my phone, I dont want to go into apple store because I think they give copy pasted solutions and expect us to give them money for them.

Please help me!