Have you updated the driver or the firmware?
http://h20566.www2.hp.com/portal/site/hpsc/public/psi/swdHome/?sp4ts.oid=238322&ac.admitted=1389048667408.876444892.199480143
http://h20566.www2.hp.com/portal/site/hpsc/public/psi/swdHome/?sp4ts.oid=238322&ac.admitted=1389048667408.876444892.199480143
