How to repair my touch screen?

Hi there,

First of all I would like to thank you for your time. I recently picked up a switch that I am trying to repair. The switch leaked over a year ago. I have already dismantled it and cleaned the oxidation marks with alcohol and a toothbrush. Currently it works as a home console, i.e. I can use it with a wired controller but there are several problems:
-the touch screen doesn't work
-The joycon charge when I put them on the rails but they are not recognised by the console, I can only connect them as external controllers while they are charging on the console...
-I'm not able to turn the console back on when it's in standby mode, so every time I want to use it I have to press the power button for a long time to turn it off completely and then turn it back on again

Everything else is working fine

Do you guys have any idea or advices about my failures ?

Thank you !