I have a HP LaserJet 1515 connected to a Windows 7 PC.

The Magenta cartridge is empty; the printer shows a warning to that effect, and won't let me print even black-and-white documents any more.

• I can't turn the warning off manually using the printer's small console: When I try to enter any menu, the display says "Menu access disabled". I have no idea why.

• There is a setting to override the warning, but it can't be changed using the Network interface in the browser (Although it is there on the status page)

• According to the manual,the HP printing tool is supposed to offer a switch for this, but it won't install on my Windows 7. It just rumbles about for half an hour, to magnificently exit with an "unknown error" requiring a reboot. On second look, the problem seems to be that Windows 7 just isn't supported. There is no download link for the tool when you specify Windows 7 as your OS.

I just want to print a black-and-white-document on a printer whose black cartridge is still 65% full.

Is this indeed impossible?

On second thought, I'm cross-posting this on the HP support forum. I'll update here if anything comes up.