If you are saying that the rotors don't spin at all and only the red light comes on, it sounds like either the motors or 4-in-1 are toast. I'm inclined to think it's the 4-in-1, especically if you see a burned spot.

One thing you must remember if you crash is to throttle down immediately. If the blades can't move, the 4-in-1 will continue to increase power to the motors trying to make them turn until something smokes. Some guys have added a fuse in the battery lead to minimize this issue.

If you bought the CX2 at your local hobby shop, bring it in and ask them to take a look. If some parts are history, you'll have to replace them, but at least you'll know what the problem is.

Hope you get it all sorted out.

Don