The age of the components used on the RM Nimbus range can result in component failure if they are still in use.
This is an example of a 104 Axial Ceramic Capacitor failure on a Nimbus VX/2
There are also situations where they fail with an internal short but show no signs
This is an example of a replaced
33uf Tantalum Capacitor on
a Nimbus PC-186
floppy controller