[Herald1360]

This may be a suck eggs and granny comment but...... do remember that valves are one of the least likely components to cause a set not to work unless they're obviously dead- no heater or lost vacuum.

As additional points- EF41 and EF89 are not physically interchangeable- they have different sockets, B8A vs B9A so a quick socket check will tell which should be there and EZ40 is unlikely as a candidate for rectifier in a basic 4+R set- it's heavier duty than the EZ41 and takes 50% more heater current.