IPhone unable to charge (After Replacement of Speaker and Home Button)?

I've just replaced the home button and the speaker enclosure for my iPhone and reassembled it all back.

After the repair, the iPhone is unable to turn on. The battery seemed flat so I tried to charge it and it'll display the "exhausted battery" icon, proceed to the apple logo, and turn itself back off after several seconds.

I've replugged it in again and left it on charge for another 15 mins but still get the same results each time I repeat the process

so was there possibly a misconfiguration (mismatched screws?) or was any of the components damaged during repair?

(I've tried a power cycle, no results and I've tried reassembling the whole thing again, 4 times in accordance to different guides, still same issue)

Added (1). It is an iPhone 4 GSM

Send it back they are responsible

  • Under iPhone 4 home button replacement During a replacement on an iPhone 4, the small circular silver tab under neath the home button attached to the iPhone body flung off and now the home button doesn't do the clicking. What is this part called as I'm trying to replace it.
  • My home button and lock button don't work on my iphone 4 Okay so about 2 weeks ago my lock button stopped working and I don't know why so I went to mts store and they said to go to the apple store and i haven't been able to go yet and then tonight I was on my phone then I went to eat dinner so i put it in my sweater pocket then after dinner i took my phone out and it wan't responding! Is there anything I can do right now other than going to an apple genius? It's like 9 at night!
  • Loose home button after screen replacement? I recently replaced my iphone 6 screen after it was shattered. A few days ago, i feel the home button is loose. If you tap the button with the edge of your nail it rocks back and forth like a see-saw. I went back to the apple store and the worker said that it was normal after a screen replacement since the old (original screen) was attached to this button. I was slightly reliefed but i'm still annoyed. The touch ID and button overall still work. What can i do? Is this really normal?
  • Is the iphone 5s' home button bigger than te iPhone 4S home button? Need As soon as possible me and my brother are getting into a fight about it cuz he said he's going to change the 4s home button to the 5s home button