You ever notice how most if not all licensed NES games have a very small portion of the contact that extends farther to the bottom edge of the PCB than the rest of the contact-proper like this?
http://satoshimatrix.files.wordpress.com/2012/03/nes-snrom-0...
Are these vital for a game to boot/be playable?
Reason for asking:
I'm trying to figure out why this good condition NES game I have "Spelunker" is booting to a black or grey screen on 3 different NES systems I own and after cleaning the cart with: staedtler eraser, qtips+91%alcohol, and finally mild use of magic eraser on the cart edge.
The only thing I notice is the contacts have those little extensions, but most are worn down almost completely or were just nubs to begin with. No signs of burnage, other than that, I suspect it's just a dead ROM :/