Kumusta Cheyenn, the discoloration problem is probably a heat issue? Since you are not new to SLI I must assume you have chosen the right PSU for the system, so you have adequate power. I would suggest that you use MSI Afterburner and go ahead and set the fan speed up to at least 70%, and maybe as high as 80% (which is where I have my 980s).
Another thing to do is power down and reverse the orientation of the SLI bridge. The proper orientation is with the top of the logo on the bridge to face the upper most card. Check your power connections to make sure they are all properly seated into the card. Check the PSU side of the same line if you use a modular PSU.
The last thing is to go into Nvidia Control Panel and make sure that SLI is on (probably you already have this one), and that your AH2 profile is set to force alternate frame method 2. That should have everything back to working.
EDIT: I examined several different bridges (MSI, PNY, ASUS, EVGA) and you can't go by the text. If you look at the connector side you will see there is something like a detent (part of a locking clip) and that should be on the back side of the card (in the direction of the CPU or power section of the MB). In 2-way SLI it should not make much difference, but it gets to be important with more cards, particularly in 3-way SLI.