If you are still running 10.1.X and you are having these random comunication problems this might help. But I doubt it. And most of us are running 10.2.1 now anyway.
This is what an HP tech sent me....
Again, we apologize for the inconvenience due to our drivers. In OS 10.1.x there were reported issues with preinstalled drivers and the Print Center. If you are running OS 10.1.x please try the following.
Perform a clean install of the driver after uninstalling and removing the hp printer folder on the Hard Drive. A proper uninstall must be performed before you download and install the 1.3.6 driver. The procedure for this is as follows
(NOTE - DO NOT USE THIS PROCEDURE IF YOU ARE RUNNING OS 10.2 OS 10.2 is shipped with built-in drivers that can be used by our printers. If you have installed the 1.3.x version of our driver we recommend that you uninstall the driver and contact Apple for assistance with reinstalling the built-in drivers that ship with OS 10.2. The PhotoSmart Printers are not supported at this time. HP has addressed this issue. Please use the following link for information regarding OS 10.2 and our line of printers.):
1: Double click on the downloaded installer icon.
2: Proceed to the window that has "easy install" on it.
3: Click on the words "easy install" and change to "uninstall"
4: Click on uninstall in the bottom right hand corner of the window and follow the prompts.
5: Open Mac OS X Hard Drive, Double-click Library folder, Double-click Printers folder, Drag the Canon and Epson folders to the DeskTop, and the hp folder to the Trash (NOTE: Do not remove Canon or Epson folders if you use a Canon or Epson printer. Do not remove ppd plug-ins or ppd's)
SUMMARY: For additional information regarding the print Center and related issues please use the following Apple KB Documents at following links:
http://docs.info.apple.com/article2.html?artnum=106726
and
http://docs.info.apple.com/article2.html?artnum=106900
6: Reinstall the driver
7: Reselect the printer in Print Center:
Select Add Printer...From the popup menu at the top of the Add Printer window, select HP Imagining Connectivity. The printer should now appear in the Product List. Highlight the printer's name, and select Add. The printer should now appear in the Printer List.
OS X 1.3.6 driver:
http://www.hp.com/cgi-bin/cposupport...t+1215+printer