As I Understand the HP Officejet 6700 premium will not copy, although It does scan and print,
No worries, as I'll be glad to help you, that said, I'll need a few more details to dissect your concern & provide an accurate solution:
Did you clean the scanner glass, the LID and the scan feeder?
Have you cleaned the ADF rollers?
While you respond to that, here's a few things you can try:
Step 1: Clean the scanner
Fingerprints, smudges, dust, or debris on the scanner glass, under the scanner lid, or in the document feed slot can cause lines and color bands. Clean these parts with a soft, lint-free cloth sprayed with glass cleaner.
Step 2: Clean the ADF rollers
Dust or paper residue on the rollers or separator pad inside the automatic document feeder (ADF) can result in copy quality issues. Open the ADF, and then clean the ADF rollers and separator pad.
Step 3: Change the copy settings
Changing the copy settings, if available, might improve copy quality. Not all printers have the option to change copy quality settings, and some printers have more or less quality options. For specific steps, refer to the printer user guide on HP.com.
Step 4: Change the paper settings
Paper type and size in the input tray that do not match the paper type and size settings on the printer control panel can result in copy quality issues.
Check the paper settings on the printer control panel. For specific steps, refer to the printer user guide on HP.com.
On the printer control panel, touch or press the Setup or Settings button or icon.
Select Paper Setup, and then select Def. paper size.
Select the paper size that is in the input tray, and then press the OK button.
Try to copy again.
If the issue persists, continue to the next step.
Step 5: Reset the printer
Resetting the printer can force some types of scanners to calibrate which might fix the problem.