Printer connection failed after power outage

[Chris Mohler]

On Sat, Sep 19, 2009 at 12:06 PM, Barbara Tobias <barbtobias09 at gmail.com> wrote:
> I recently purchased an HP wireless printer 6500 e709n and have been
> using it quite happily with Ubuntu 9.04.  This morning we had a series
> of power outages and now when I attempt to print a test page, it tells
> me:
>        Printer 'HP-Officejet-6500-e709n2' may not be connected.
>
> However, we can print to this same printer on the same network with a
> Windows PC.  I'm not sure where to look to try to fix it.  I'm wondering
> if I need to remove the printer and reinstall.

Remove/Add printer should be pretty quick and worth a shot.  If it
shows up as the first item in the list after selecting 'New Printer',
then you should be in business.

Some things to check:

When the power went out, did the Ubuntu machine maybe connect to
another wifi network - a neighbor, etc?

Can you see/ping the printer from Ubuntu?
Here's how I just tracked down my wifi printer:
$ ifconfig wlan0
wlan0     Link encap:Ethernet  HWaddr 00:1c:bf:10:dc:10
          inet addr:192.168.1.103  Bcast:192.168.1.255  Mask:255.255.255.0
[snipped]

$ nmap  192.168.1.*  (took the first three of the IP address in the
above command)

Starting Nmap 4.62 ( http://nmap.org ) at 2009-09-19 15:10 CDT

[snipped]

Interesting ports on 192.168.1.250:
Not shown: 1709 closed ports
PORT     STATE SERVICE
21/tcp   open  ftp
23/tcp   open  telnet
80/tcp   open  http
515/tcp  open  printer
631/tcp  open  ipp
9100/tcp open  jetdirect

Notice the ipp and jetdirect ports.

Then you should be able to ping the printer's IP or hostname....

HTH,
Chris