@stifgs start by following the No Power flowchart.
[image|1859082]
For this we would need some good pictures of your board to point out components etc.
This maybe a little easier just not as comprehensive
[image|1859080]
[image|1859081]
Bottom line is I’d start with a new battery (check your charger!). These guides will help you getting into your phone
[[Topic:Samsung Galaxy S9 Plus]]
[guide|21499]