Switch oled won't charge or respond at all

my switch oled randomly over the holidays stopped receiving power after about 3 weeks of use. It will not charge at all, I've used multiple cables and it still won't charge, the dock also won't recognize it's on it at all. No charge led or anything. I've tried to do the power cycle things, holding the power button for several seconds and such. I've removed the joycons, game card and SD card and it still has no response. I have a repair kit, I just don't know what is wrong with it so I can get the new parts. If anyone has any recommendations please let me know, this has been a crisis for almost 3 months. I'm having a hard time diagnosing the issue and don't even know where to start. Any advice would be appreciated