Alright so a while back I made a thread concerning three NGPC games that I picked up that simply wouldn't work. No matter what I did, how I cleaned them, they wouldn't boot. I had basically given up on them, figured it was beyond my control.
So fast forward to tonight. My NGPC is sitting on my table, so I figured I'd play some Metal Slug 1st Mission for a bit. I turn on the system, it starts to load the game, and I realize that it's already past 3:30 AM and that I should go to bed. I turn off the system, but just before I put it away I see that copy of Samurai Shodown 2 staring back at me, mocking me! So I pop it in for shits and giggles, knowing it won't work. The NGPC intro plays, then suddenly the screen goes black and "SNK" appears in big blue letters.

The damn game is working! It loads up, and I play a round or two of Samurai Shodown, in complete shock. Giddy from this miraculous event of spontaneous cartridge magic, I rush over to my videogame bin and pull out the other two games: Fatal Fury First Contact, and an unlabeled game. I pop in Fatal Fury, and it doesn't work. Spurred on by my previous success however, reseat the game a couple times, and voila! It works! Then I put in the unlabeled cartridge, and it works too! Turns out to be Pac-man. So basically I now have three new working games for my NGPC, and I couldn't be happier. Now if only the damn thing had a backlight!
So this whole thing has got me wondering, does anyone here have any similar stories of otherwise non-working videogames or systems spontaneously coming back to life when you least expect it?