Samsung A20s won't turn on after replacing screen, see phone charging

HI

I just replace a screen on a Samsung A20s SM-A207M. I’ve doubled check all ribbon connectors, contacts. Upon powering up, it shows the unit charging, but does not go any further. I tried holding the volume button down and the power button for more than 15 seconds but with no success. Even tried the volume up/power down with no progress. Is there any issue?