Bart.x wrote: All condensers, as I said, are not swollen
Because they don't have to be !!! You have electronics in your profile and you don't know that they could just lose their capacity, dry ... ???
You should measure the capacity or change them blindly - the cost is a few zlotys and not be tested "by eye".
Anyway, if you would go to the trouble and review the linked topics, you would know that this is the most common cause of faults in these decoders.