Chosen Solution

I was replacing the shell of my switch. When I did I messed up one of the joycons ribbons. But wasn’t syncing up. So then I replaced the charging slider for that side. At first it powered up before I replaced the slider. But when I when put the new joycon sliders on and went to check it. The screen wouldn’t turn on. Thought it was dead but still hasn’t turned on. I prefer fix it myself. So could it be the battery? Or did the screen break as well?

Samething happened to me on my switch lite they don’t turn on and I read a article by business insider. link:https://www.businessinsider.com/why-wont…

I tried that with no success. Only found one shop that would work on it. But wanted to find other options first. I think it’s the battery or the screen just hard to tell which.