I have a Nintendo DS Original unit, truly in 8/10 condition looks hardly used and got it in a lot. The console does not charge (tested several chargers with it) and put a known charged battery in the compartment and that doesnt work either. Upon opening up none of the liquid sensors are tripped and no corrosion on the motherboard.
Checked all ribbon cables are seated properly but reseated anyways. Checked power button contact and that looked to be fine. Any ideas?