Phone won't turn on again after screen replacement
Texto:
So I dropped my phone and the screen cracked, green/black and dislodged from its socket. I ordered a new screen and disassembled the phone while waiting for the new screen. It took around three weeks since I live in the middle of nowhere.
When I plug my new screen for testing, the phone won't turn on. The only input I get any sort of response from, is when I hold the power and volume up button for 10 seconds. This makes the phone do a quick lil vibration and that's all.
I don't think the new screen is the issue. Has the battery been discharged? If it has, the phone wouldn't vibrate at all, right? I don't see what else even could be the problem. The phone worked prior to disassembly besides the, by then, black screen and a few working pixels near one of the edges. Speaker worked fine and google assistant was responsive.
I had the charger plugged in for 4-5 hours, yet nothing changed. The battery pin is plugged in. The daughterboard and speaker thing are still disconnected but the screen should still work without them, right? Sim/SD card tray are unplugged too if that's important. What could the issue be here?