Seem to have cracked it.

I suspected it was a software prob, so I re-loaded latest driver from KM site.

No joy. And still no display.

So re-loaded original drivers off the CD. (Find box, find CD, find USB DVD player to plug into netbook etc.)

Can now access status display and see supplies status! None exhausted but magenta a bit low (4% left) which is prolly why "colour toner" light is flashing on printer. But it prints!

Thank you all for your interest. So much for "always install the latest drivers" Yeah, right, maybe. But not this time.

In reply to a post by Titus:

So much for "always install the latest drivers"

Agreed. Windows 7 drivers for older printers can be absolutely carp. Windows may recognise the printer but the drivers that it installs can be useless. I have driver problems with my HP OfficeJet all-in-one.

Can not help on the mxxxxxx printer, other than a suggestion to strip down the printer as much as possible and clean it. I use nail polish remover for cleaning. That normally kicks away any funny 'issues' with non printing.

What HP office all in one printer do you have.. I have my HP2710 running inside WIN7 with no problems.