Chosen Solution
so recently i got this DS Lite from my mother (it was from her workplace and no one decided to pick it up for a little over a year now at this point) and i tried charging it, and it does and it turns on, but momentarily, so i’m stuck here
If it powers on then turns off immediately, it’s one of two items, either: A) the lower LCD is shot or B) the upper LCD and/or ribbon is broken/torn. Luckily, being a DS Lite, they’re both easy to replace. Those two items are your best bet to get it turned on again. Follow this guide to get at either upper or lower LCD: Nintendo DS Lite Upper LCD Replacement