Blue light currently on steadily.
Red light - lowest one - also on steadily.
Apologies, I have to take a break, or give up on this. I have downloaded Easy Printer Manager for Mac - but it won't open. Need to take a break from this wasted time.
Finally managed to download Ssmsung Easy Printer Manager, which says 'Paper is empty in Tray 1'.(of the Samsung printer0.
I can see only one paper tray, which is not empty. Any further advice?
Sadly, same as before - error green for a few seconds, then turns red.
Find it hard to believe I need to renew imaging unit on a printer only a couple of weeks old - which was working fine.
Maybe we should give up on this one -