I was having the same problems. I assume you saw an earlier post from HP, but in case you didn't I attached the link below. I tried the three different methods that HP recommended and found the "Apple Preview Method" helped me. I am now able to scan and save what I have scanned. (I never had problems printing)
How to Scan: OS X v10.9
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03967506
