I know you want to do it yourself but this not something to mess with. The cables as part of my automatic garage door opener system somehow got tangled. I had awhile ago had the spring professionally replaced. Anyways, I couldn't close the door myself so my neighbor helped me figure it out. We unhooked the cables to free the door. My god, we were surprised how heavy a wooden garage door can be (esp with gravity aiding it). Even though my neighbor was grasping by the emergency cable/latch and I trying to slow it down (no handles on door though) it came crashing down with a big thud. Luckily no one was under that door. Please, just have a pro take care of it.