Scanner worked for years on mac, now won't

Scanning worked fine for several years in its present configuartion with my desktop MAC. Then today it started scanning and showing one item as four or five separate scans instead of just one. It did the same when I scanned on my other HP, a Photosmart 7520. I reinstalled the HP software from CD, but now it will not connect using the same USB printer cable as always. 

That may be due to something that happened on the OS side, such as an update.  Apple controls the drivers for the scanner function and if a update/upgrade was done, then perhaps that is the reason.  If the OS was updated to Yosemite in this time period, that would definitely account for the problem.

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