I have an HP 2100tn printer that works on 220V and I use a 500W step up & down transformer between it and my outlet.
The other day when I turned the transformer on the printer light came on, but then went out.
Now the transformer vibrates slight as if there is a fan on inside, but I never noticed this when everything was working.
I'm thinking that power is not getting to my printer and I wanted to get advice on how to narrow the problem down.
If anyone is familiar with it, I have a Fluke 8060A digital multimeter and would appreciate ideas on what and how to check first.
Darren Harris Staten Island, New York.