My 3DS heating up when i play games. Console getting pretty warm in the left part of back side, where the CPU is located. It's not hot to burn or anything, but annoy me. I have old revision 3ds/3ds xl and they never heating up while playing. They are heated only when charging. So, i decided to teardown n3ds xl and made some tests. Inside i found many inscriptions maded by black marker. And some strange spots with bad soldering. Pictures under spoiler: I have many game consoles, but i never see something like this inside them. I tried to find pictures of n3ds motherboards. I find some. No inscriptions/black marker/strange spots at all. Maybe someone faced with similar situations? Inscriptions on motherboard common for n3ds or shop sold me repaired/refurbished unit?