Had a chance to investigate a bit more.
Tried giving the board a bath in isopropyl, just on the off chance of something I'd missed. No change.
But I do get more varied behavior, for a while it was going straight to update menu as if Up and X...
Hi All,
Hopefully the right place to ask this one! Bought a 3DS to fix up from ebay as a fun project for myself to learn some more. Thought I was doing well after finding disconnected speaker cable and getting it to boot, but one problem still...