rkenders, that's a good troubleshooting method,but he has a 2012 oled, not a 2011.
You can follow the same steps he suggets, but you'll want to look at the display on the handle. the top part of the display is where you can see your eye information. on the top left it'll say 2c or 4c, depending on which eyes you have installed (assuming they're working normally), or "X" if they're turned off. it sounds like you already know where to look for that info, though. the upper right hand side has two little blocks, one for each set of eyes (upper and lower), but IIRC it's just one big block if you only have 2c eyes. However, the display should change from an open box to a solid box if you stick your finger in the feedneck deep enough to block the eyes.
Like Rkenders said: MAKE SURE YOUR GUN IS DEGASSED. In fact, I'd take the bolt out, just in case. a misfire in that situation would seriously mess up your finger, and probably the gun, too. (though, I doubt you'd care about the gun by that point in time).
Originally Posted by rkenders
Do this with the 4c eyes installed...
No air, no paint, no loader.
1. Turn on the gun. The LED should go slow blinking blue indicating no paint detected. If the LED goes any other color besides slow blinking blue, you have an eye fault or the eyes are blocked.
2. Stick your finger part way down the breach so you just block the upper eyes. The LED should change to solid blue, but if you pull the trigger the solenoid wont click.
3. Stick your finger all the way into the breach. The LED turns solid teal or light blue. Pull the trigger once and the solenoid should click. Remove your finger and put it back into the breach. The LED should go slow blinking blue to solid teal. If you still have your finger in the breach after you pull the trigger, the gun will detect an eye fault and change to purple which also indicates the lower eyes are blocked.
4. If you don't get the above test results, pull out the eye boards and clean out the eye holes on both sides and clean up the eye covers if they are dirty. If there is any paint fill on the eye boards, remove them and run them under warm water and lightly scrub both sides of the boards with an old tooth brush until they are clean. I know these are electronic devices, but they are unpowered and can't be hurt by a little water. I've done this myself several times on my G6r when the eye boards get paint on them. Now thoroughly dry them off and blow on both sides of the boards and in the tiny connectors to push out any hidden water. Reinstall the 4c eyes and confirm you don't have a pinched wire or loose connector. Do steps 1-3 again.
[EDIT]: do you still have the 2c eyes? If so, try swapping them out to see if the problem follows the eyes or not. Next step would be do try swapping the wiring harness for the eyes, and then a call to BLAST.