Doesnt power on but charges battery and fuse ok

Hi everyone!

Got a dsi which doesnt power on but charges fine with a solid orange light. No fises are blown as I continuity tested them. Heres what I already tried

. Changed the battery to a new one

. Checked both fuses and they are both good

. Double checked all ribbon cables and they are all firmly attached

. Checked with a multimeter if voltahe was getting to the motherboard from the power board and it is working fine

. By the way, this has no water damage and no corrosion on the board

I'm not sure what else to try…

I press the start button and nothing happens. Kept it pressed for almost 2 min, still, nothing. Not even a blink on the screen or a blue led flash.

Any ideas??

Added couple images of the board in case someone sees something I missed?

Thanks!