So I recently got this switch lite with no power, turned out it had a missing pad (which tells me this system has been worked on before). After fixing that I also noticed 2 of the capacitors on the APU were gone, so I also replaced those ( 0201 1UF 6.3V X5R 20%).
Now the system boots but turns off immediately after showing the Nintendo logo for 2 seconds.
I’m new to the switch scene and still have no clue what are the procedures for the diagnosis of these!
Thanks for your help!