HP ScanJet 4070 Photosmart produces just stripes after OS upgrade My HP Scanjet 4070 stoped working after an upgrade to the current MacOS. It scans the pictures but then the saved PDF only contains stripes: 



This happens on two machines. What can I do?

I asked in the HP support forum. They sent me on to another support forum and in the second forum nobody cared.
From HP forums:


  The ScanJet 4070 software will not be updated to work with Mac OS
  10.9. 
  
  You might be able to successfully connect to the scanner but using the
  HP Scan software results in file saving errors or all gray output.
  
  You might try a third party solution like VueScan.  
  
  You will need to install the HP Software and 10.8 patch first....


It costs $40 -- $80 depending on your choice.

You can still try and download this driver, but I doubt it will help.