Alfa Romeo 147 - Remote control for the central locking alfa romeo 147

Hello,
I have a problem with the remote from the central locking in alfie 147. I bought it not long ago and the owner said that it only opens with the key, I thought to change the batteries and it helped, but the door can only be closed or the trunk open, although you have to press very hard. However, the door still needs to be opened with the key ... What could be the reason for this? Can I unscrew the key without fear that it will unprogram it? Is it better not to touch it yourself?

First, the pilot tester and check if the pilot "emits" radio waves.
Then you will know where to look for the fault.

After all, it sends because from this gibberish I understood that "opens the trunk with the remote control"
You have no idea, do not run, take it to someone who has a bit of knowledge, because the cost will be 3 times higher, first check if the body sees the door opening command, how is it not possible that only the buttons are made when it sees the trunk. Next is checking the locks!