I replaced the motherboard It keeps rebooting on and off while charging sometimes it stops

[AC Question]

The goes on and off the whole night

 

[Rukbat]

Either you did something wrong or the motherboard you used is defective. (This is why shops don't like to repair phones you've worked on - it could be this, it could be that ... and by the time they've found it, the bill is twice the price of a new phone.)