Help with consolized MVS!

I just got a consolized MV-1F and when I put in KOF 98 and turned it on I got this:

http://i39.tinypic.com/i6xh68.jpg

when the games start the picture scrambles like the Neo Geo logo on unibios, here's an example (KOF 94):

http://i44.tinypic.com/30kyixs.jpg

I've tried 4 carts and all of them are like this, some are worse then others. I've switched regions and switched A/V cables. Nothing seems to work. What could the problem be? Unibios? My TV?

Any corroded traces anywhere? Slots all clean?

That means clean your cart and reinsert the game.

Yeah as the others have said, make sure to clean the carts and your 1-slot if need be. http://www.hardmvs.com/html/cleaning.htm http://www.hardmvs.com/html/slotCleaning.htm

Sometimes you may need to very carefully, slightly adjust the cart in the slot. With that said, a good cleaning will more than likely fix this problem.

The MVS pin connectors look clean but I'll try this tomorrow on both the carts and MVS to see if it works. Thanks.

Use a q-tip on the cart contacts for now and just see if it makes a difference.