garage door remote control

I am a very happy chappie. Our electric roller garage doors are opened via a small key fob. Well the battery in the fob died. so ordered new batteries which have just come.
The problem was the company had locked the reciever panel with a series of correct button pushes. To call them out last time cost £40, so I thought it can't be that hard.

Good old internet to the rescue yet again. one person had posted how to do it in a video with exactly the same as we have.
So with the new battery in the key fob and going to the receiver panel it was easy following the instructions on my Andriod pad
at the end of the instructions it even showed how to lock the receiver again.

I Google everything, there's usually a video on YouTube to sort every issue with appliances etc