canon vixia HF20 - screen flickers

Someone attached a wrong power cable to the camera. Now with the right power cable the screen flickers with various colors but there is no picture. I can view the pictures and video that have already been taken but I can't take new ones. Is the camera shot? or is it repairable? if so how? please contact me david potter 801-703-3071 davidjohnpotter@hotmail.com thanks