BWD oscilloscope not working

[tommo]

I have a bwd 539 dual beam cro, when I turn it on I do not get a trace however if I pull the plug out I get a dot appearing on the screen that stays for a short time

 

[(*steve*)]

Check the triggering. The scope may be waiting for a trigger that never comes...

 

[harveyradar]

BWD539 CRO operation

tommo,
try this

www.harvey.edwards.net/HowtouseaBWD539Oscilloscope.pdf

it may help
cheers
harvey