I have a HP LaserJet III printer. It's quite a few years old, and was working ok until I switched in on today.
When it's switched on it usually make quite a loud whirring noise. Though when I switched it on today, it's not making the same loud whirring noise; the noise is very muted. As if the fan is much quieter.
It also has a "50 Service" message on the small printer screen.
Would anyone know what might be wrong...? Thanks for any help!