BFT MIZAR 6 opens the door but does not close

[Michvra]

the door opens normally but does not close but after some time if i tray to close the door close 

I observed that the close relay does not armed 

I have the opinion that, exist problem with board capacitors after 20 years the capacity is low but I does not what capacitor must change

If someone knows  please give me  a note before change all the MIZAR 6

THANKS