03-14-2012 09:51 PM
My OS is Mac OS X 10.7.3, Lion. Our new HP OfficeJet 6500A prints OK, but will not scan: Message on the printer front panel is "No Computer Detected," message in the iMac Open Scanner window is "Failed to Open a Session on the Device." When I atttempt to scan, the printer and computer lose their wireless connection. Is this a Lion problem or an HP 6500A problem? How fix?
03-14-2012 11:01 PM
Quick update: Turning the printer off and then back on solved the problem, at least temporarily. It scanned! Does anyone have a more permanent solution? Thanks — j-k
03-16-2012 10:19 AM
Hey there. Try working through this document:
Hope this helps!
03-16-2012 10:48 AM
Hi, SeanS: Thank you. Is there a similar document for the Mac OS? This one addresses only Windows, and I'm on an iMac with OS 10.7.3 (Lion).
(Turning the printer off and then back on solved the problem a couple of days ago, so that is a workaround. I just wonder if there's some underlying flaw in the connection, installation, driver, etc., that we can correct.)
03-14-2016 09:32 AM
I came here looking for a solution to the very same problem for our Windows 10 computers. The document you link to no longer exists, but the printer problem is still with us. Is there a better solution? This printer works fine, and we can scan to memory cards, but that seems to defeat the entire purpose of having a wireless all-in-one printer...
04-18-2016 02:18 AM
Hey HP, why not actually fix the problem of your printer becoming inaccessible rather than recommending unchecking the box and sweeping it under the rug? This is an annoying problem that is affecting every Windows 10 computer in our environment!