Try upgrading the firmware.
http://h20566.www2.hp.com/portal/site/hpsc/public/psi/swdHome/?sp4ts.oid=15026&ac.admitted=1390932753323.876444892.199480143
Follow the link.
http://h20566.www2.hp.com/portal/site/hpsc/public/psi/swdHome/?sp4ts.oid=15026&ac.admitted=1390932753323.876444892.199480143
Follow the link.
