[Station X]

Voltage readings on valve sets should be taken with the black negative lead of your meter connected to chassis with a croc clip. You can then use a probe on the red positive lead to connect to each valve pin in turn. Looking from UNDER the chassis, valve pins number clockwise from the gap or spigot.

Post the voltages on each pin here and someone will advise you.

I'm afraid that a visual check of a capacitor will not tell you if it's faulty unless it's been blown to bits or is leaking liquid. However faulty capacitors will show up as incorrect voltages.