printer problem

[tearinghair]

I've just changed my colour cartridge (HP57). which I've done many times before. Immediately afterwards, as usual, it produced its 'test card', but since then I can't print anything. I can't take out and re-insert the cartridge, because the two printer lights (orange and green) are on so that the carriage won't move when I open the top.

I tried the Help section, which asked me to check which port the printer is connected to. The only port that has a printer name next to it refers to an old printer I got rid of years ago.

In the printer queue, the documents that failed to print (and which I've now deleted) don't have the correct name, just a line of letters and numbers starting mhtml:mid// - don't know if this is significant?

The only thing I can think of that's different is that I've recently saved a document from my camera software as an xps. But I've done that before without any problem.

I'd be really grateful for any help.

[1rovert]

Try uninstalling it, and then reinstall it.

rojash will know.

[tearinghair]

I wondered about doing that, but it always scares me. Would I need to find the original software? - because I don't think I can, and I didn't set it up myself anyway. If it's just a matter of pressing a few keys, that's Ok, but if it's anything more drastic I'd probably make a mess of it.
It definitely seems to be the hardware that's the problem.

[sometimesit]

Switch it off & pull the plug out. The re-connect and switch on.

[tearinghair]

I tried that - no change. Perhaps I should disconnect the whole thing.

[tearinghair]

No, still the same.

[tearinghair]

Finally sorted. Uninstalled and reinstalled with no change, so decided it must be the cartridge not properly engaged. My husband is braver than I am, so he fiddled around within the printer and released the carriage; the cartridge was not in correctly (which surprised me as I am usually very careful about that).
Many thanks to 1rovert and sometimesit for your suggestions.