I just inherited one of the formentioned units from a local fella. It came with everything intact, as far as I can tell, but when I plug it in, I get nothing. The fans are going, but no light. The bulbs look fine - the filament is intact - so I'm wondering why I don't get anything outta this? Also, I'd like to use it for B/W printing only - can I use the filters to manage contrasts like VC filters? My knowledge is limited to cold lights and condenser enlargers, so I'm venturing into new territory here. Thanks in advance.