[ubuntu-uk] printer problem

[Norman Silverstone]

The printer in question, an HP P1505n, is connected to a router by a
cable as is a laptop running Ubuntu 10.04. Several months ago the
printer was set up and working using the laptop and, in addition, was
working wirelessly with a desktop machine running Windows XP Pro and
wirelessly with another desktop machine running Ubuntu 9.10. A few weeks
ago both of the Ubuntu machines would not print files and, despite
trying all the tests I can find, I have been unable to sort out how to
put things right. Two days ago I set up another desktop machine running
Windows XP Pro which is happily printing files wirelessly.

Please, can someone suggest how to troubleshoot this problem.

Norman