Switch won't turn on (when plugged into a charger it flashes charging screen)

Uh so i didn't use this switch for around 1-2 months but when i try to use it now i get these issues.

Doesn't turn on if no charger is plugged in (tried all the youtube videos but if you want me to try something i don't mind trying it!)

Uhhh but when plugged in the official switch charger (or any charger) it flashes the switch power off charging screen then it goes blank and goes in a loop

VIdeo: https://streamable.com/gc00xm

Background sound isn't switch i don't think in the video

this is a switch with a mod chip i believe

Any suggestions or help given i'll be very thankful for <3