Yosemite and Officejet 6700

Question

Since upgrading to Yosemite I am unable to print (haven't tried scanning function as it's lower priority). The printer and imac appear to be communicating (I can see ink cartridge levels, the print job screen says "connected to printer" but when I click print nothing happens...
A windows based computer in my home WILL print to the 6700 wirelessly and a test print initiated from the 6700 worked fine.
So far I have tried all the steps below as recommended on a different thread. Where do I go from here.
"Bonjour Highest Priority Service
1. Print a Network Configuration Page from your HP Printer, check hp.com for specific steps for your printer to complete this
NOTE: If your printer does not have an IP address, then you will need to follow Network troubleshooting steps from your HP Printer Product Page.
2. Enter the IP Address of your HP Printer from the Network Configuration Page into Safari or other supported Web Browsers on your Mac
3. Check for a Network tab and click
4. Click on Bonjour on the left side (Click Advanced or Advanced settings if you do not see Bonjour)
5. Locate the “Bonjour Highest Priority Service” drop down and choose “9100 Printing”
6. Click on “Apply” and or “OK” this step may vary – follow prompts to approve changes
If the above steps resolved your issue, you do not have to continue troubleshooting any further.  If you are still having issues, please continue to the next steps.
10.10 Yosemite, first off, ensure you have the latest Updates, this includes Apple Updates as well as HP Updates through Apple Software Update (ASU), presently HP Printer Software Update Ver3.0
Check Apple for Updates (ASU)
1. Click on the Apple in the top left menu bar
2. Click on “About This Mac”
3. Click on the “Software Updates…” button
4. Ensure the “Updates” icon is selected, click on “Store” from top menu
5. Click on “Reload Page”
6. Install any HP Updates (Look for the Latest “HP Printer Software Update” by version number)
Note: If you are unable to Print or Scan if this is a multi-function HP Printer, then follow the steps below.
Remove The HP Printer from the Printer Queue
1. Click on System Preferences
2. Click on Printers & Scanners
3. Click your HP Printer to highlight, then click the “-“ symbol below to remove from queue
4. Click the “Delete Printer” button to confirm
Add the HP Printer back into the Printer Queue
1. Click the “+” symbol on the lower left
2. If a drop down listed with printers appears, simply click on “Add Printer or Scanner…”
3. Select your HP Printer or series printer (this depends on the type of connection, USB/Ethernet/Wireless, so choose your HP Printer with the correct connection , IE Bonjour for single function printers, and Bonjour Multifunction for a multifunction printer)
4. After the lower part populate, click on the dropdown for “Use:” and select your HP Printer Series
5. Click on the “Add” button
If the above steps resolved your issue, you do not have to continue troubleshooting any further.  If you are still having issues, please continue to the next steps.
Before Continuing, the following steps will remove ALL Printers from Printers & Scanners, you may need your Software/Drivers for those printers to re-install if it is not part of the Apple Software Updates.
Reset Printing System:
1. Open System Preferences
2. Open Printers & Scanners
3. On the left side where printers would be listed, right click and select "Reset printing system..."
4. Click the "Reset" button when asked to confirm
5. Enter your Password and click OK (if prompted)
6. When complete, (notifications may not pop up) you will simply see the blank "Printers & Scanners", simply close
Remove HP/Hewlett-Packard Software:
1. Go to "Finder"
2. Go to "Applications"
3. Locate and open the "Hewlett-Packard" folder
4. If you see an "HP Uninstaller" listed here then run the Uninstaller, if not, then skip to step 8
5. Click on the "Continue" button
6. Enter your Password and click OK (if prompted)
7. When complete, click "Quit"
8. Remove HP or Hewlett-Packard folder (if still listed after uninstall) drag folder to the trash can
9. Right click the Trash Can in the dock, click "Empty" - then confirm to Empty Trash
 Repair Disk Permissions
1. Still in Finder, click on Applications
2. Open Utilities folder
3. Double-Click on Disk Utility
4. On the left side, click on the Hard Drive that has 10.10 Yosemite installed on to highlight it
5. Click on the "Repair Disk Permissions" near the lower middle of the window (the amount of time can vary to complete)
6. When Repair is finished, a message near the bottom window "Permissions repair complete”, now you can close Disk Utility
7. Click on the Apple in the left top corner, click on "Restart" to Restart your Mac
Manually Install HP Printer Drivers v3.0
1.This link will take you directly to Apples download for HP Printer Drivers v3.0
2. Click on the "Download" button (remember where your download is if your downloads are not on the dock)
3. Open the "HPPrinterDrviers3.0.dmg"
4. Double-click the "HewlettPackardPrinterDrivers.pkg”
5. Click on the "Continue" button
6. After reading the license agreement, click on the "Continue" button
7. Click on the "Agree" button if you agree
8. Click on the Hard Drive that 10.10 Yosemite is installed on and click Continue
9. Click the "Install" button (this will install the HP Drivers to your Mac)
10. Enter your Password and click the "Install Software" button (if prompted)
11. Click the "Close" button when "The installation was successful." message appears
Add Printer to Print Queue
1. Open System Preferences
2. Open Printers & Scanners
3. Click the "+" symbol
4. Click "Add Printer or Scanner..."
5. Click on "Photosmart Plus B210 series"
6. Click the dropdown for "Use:" and choose "HP Photosmart Plus B210 series"
7. Click on the "Add" button"

Answer 1

I went into the router to check the settings and found I was due for a firmware update. I updated the firmware and all appears to work now! Grr.