Unfortunately motors with battery backup are not created equal. You have battery backup and battery dependent motors, both of these operate in the same manner if there is no power. The difference comes in with how they operate when there is power.
One thing you should do before trying to manually open the garage door is to determine the cause of the problem. In some cases, such as a jammed door or a lifting cable that has parted, it is obvious what the problem is or could be.
For the purpose of this article we will be looking specifically in the event that you have a broken garage door spring. We will be discussing how to open a sectional garage door with a broken spring or springs.
Garage door springs are the backbone of your garage door. If they break, you're in for some major headaches. But before we get into replacing them, let's take a look at what types of springs there are and how they work.