Jumbled Screen on my Flashback 2+

I have a thread on this in the Flashback forums that is ongoing - I'm talking to myself in there. . . .

Over here I wanted to find out if anyone could point me in a direction for troubleshooting a jumbled screen like this:

http://www.atariage....ttach_id=224321

My flashback has a cart mod installed that has never worked. The picture is of the flashback menu which did work before I started the mod. Switched to the cart, the screen is also similarly jumbled, but with different colors. I can take a pic of that if someone is interested.

What do you think could cause a display like the one in the picture?

I'll say that while doing the mod, the AV wires became disconnected from their "sub board." This was annoying because while they were partially connected I was testing the display thinking that my work was bad. Anyway, I stripped and resoldered the AV wires to this "sub board" but when I test the connections from the tips of the AV cable that plugs into the TV to the end connection on the bard I get something like 2 ohm resistance. That is still really low, but I'm wondering if it could be causing my problem. When I test a regular set of RCA cables not associated with this mod at all there is less than 1 ohm resistance from end to end.

I don't think that I've damaged the onboard ROM, that seems unlikely, but I guess its possible. I would think that if I Damaged the "Michelle" chip, I would get nothing at all. Also, both of these chips are sealed under high grade epoxy (er something).

I think there must be an explanation to whats happened here that I should be able to figure out. I just was wondering if you could point me in any directions to begin testing resistors or power or something else specific that you think could jumble things up like that.

If I can't figure anything else out, my next step is to completely remove all my connections for the cart mod and test again. Basic t'shooting to just undo what I did and go back to the last state I tested successfully.