Board Repair Help Not Powering On

Hello Everyone, i have a dell inspiron N5010 that was working until my nephew stop by over and plug the charger to the wall and power the laptop on and said is not powering on. i remove the battery and try to power it on nothing came up So i went and bought a new charger and a new battery and install it and nothing at all. i measure the charger i get 19v i took the board out and try to power it on with no keyboard no hard drive just ram and the power button and fan. Same thing No Power. So i buy a new daughter board to replace the DC jack and i install it and i still don't get any power at all i assume is the board, i place my hand around it to feel any warm or hot and the only area it gets warm is PU4601. Now i dont know much about reparing boards but i will like for you to tell me whats next to measure.

Berry DG15 Intel PCH REV A00 for Schematics