Ok, first things first -- this is not my first repair, but I thought I should start with a repair log of something unusual. Neo Geo MVS carts are not usually something that one would repair, since most games are relatively affordable and as such are easily replaced. On the other hand, these repairs are usually somewhat trivial, requiring just track repair, maskrom replacement, solder touch up or if you're unlucky, the replacement of one of SNK's custom chips. This one however was not such a case. The patient. The game I was sent -- SvC Chaos -- was one of the last games published for the MVS. The cart has an unique PROG board with a custom that only exists on it, the NEO-PVC. This chip basically serves as copy protection and without it, the game does not work at all. I was sent this cart for repair with the quite accurate description of it not working and that it had happened suddenly. Indeed, it was the case, displaying a blank screen upon booting. Or more accur...