Need help with my one-slot NEO GEO arcade cab.

I recapped the monitor on my NEO GEO arcade cab tonight. Everything went well when I restarted the game. Decided to go ahead and set the game on free-play while I had the back off. I shut down the game and turn dip swith pins 1 & 2 to the "on" position. When I powered the game back up, the screen was completely garbled. I can still hear the game load and go through the intro, but the screen is a complete mess. What the hell happened? I didn't touch anything other than the dip switches. I tried to reseat the cartridge to make sure I didn't bump it. Same with the edge connector on the harness. Any ideas what happened?

Nevermind. Apparently I somehow hit the horiz hold pot and skewed the whole screen. I need to go to bed, making stupid mistakes this time of night.