I have mac laptops and hp laptops. My mac laptops print wirelessly to my hp L7780 and my hp laptops have trouble

HP Officejet Pro L7780 Drivers
I think the drivers are not installed on the new system. Please visit the above link from HP Official Support. Select the Operating System (e.g Windows XP OR Windows7 32-bit) that you have on your PC. Download the drivers/ Software and install them by following the on-screen instructions.

Hope it helps! Good Luck!
CreativeTECH

HP Officejet Pro L7780 Wireless All-in-One Color Printer

There is conflict between the Printer and Router you are using. The Router is freezing the printer connectivity to the network due to the Wireless radio ON option in the printer

There is a firmware update for your printer, Let your printer be connected thru USB and from this link, download and install the update for your printer and later try setting it up wireless, it should work.

http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=mp-62339-2&lc=en&dlc=en&cc=us&os=2093&product=2512010&sw_lang=

If this step fails, the other step is, to Enter the printer IP Address manually in the printer Network menu from SEtup Option and later run the wireless setup wizard to connect it to the network.

in this model there is a problem with wifi connection, hp has just released its patch, connect the printer with usb cable and then donwload the patch from hp.com/support and then run the patch, it will find the printer and it will update the firmwar of printer, and i asure u that then it will start working fine,i have resolve this problem alot, i am from hp itself. :)

uninstall the complete software and reinstall every thing back in with wireless set up if not work follow this link http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00503569&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN
and for our technician support contact us at http://tinyurl.com/mtgjzz

I just purchased a hp officejet pro L7780 all in one wireless trying to set up system - was suppose to have a poster sheet to guide me -- NO GUIDE POSTER - can i view one on line somewhere at no cost -

HI,

Yes, surely its possible as long as you installed the SW properly in to your computer.

Thank you so much.

adonscott

hello... yes you can scan wirelessly in mac X 10.5 version. pls click this link below this a software of the full version of your printer that supporting your MAC OS

I had the exact same problem but never could get my Mac to work wirelessly with my 7780 even though the box said it was wireless and worked with OSX....false advertising.  Enough of the problem though.
I set up my printer through my Airport Extreme network.  That solution worked sporadically.  I would get error messages that the computer could not open the printer.  I found clicking the "pause" print button and then clicking "resume" would often work but needless to say that became a pain.
So, my IT guy set the printer up through it's IP address over my airport extreme network.  The printed has worked flawlessly for the last week since this change but.....the fax no longer works and now the scanner takes about 3 minutes per page.
Overall, I have been a die hard HP fan for years but after the nightmares with the L7780, I will NEVER use another HP product.  The item cost me about $459 but I have lost or spent over $5,000 in diminished productivity and IT charges and it STILL DOESN'T WORK AS ADVERTISED!

Goto Office button-> Print-> properties-> Change paper size to A4