I had the same problem many years ago. I think I loosened the phillips head screw that holds the solenoid panel to the chassis and moved the assembly to the right a little but I can’t be sure.
Here is a link to a good description of problem solving the door issue:
https://beolover.blogspot.com/2021/12/beomaster-5000-type-2323-solving.html
You should be careful opening the door after all these years. The flexible cable that connects the circuits from the panel to the main system breaks over time and then you have big problem.
Good luck,.
Bill