I recently found that my PC would not play Cd's and DVDs. Tried various options LIKE searching for new updated drivers, using different players from normal WMP, like real player etc. but nothing worked so bought external liteon eNAU608 drive. Tried connecting thru all 6 usb PORTS and with both usb CONNECTORS provided. No luck. Smartpack utility says no optical devices detected. Can anybody help pls? Have sent an email to liteon yesterday but yet to receive reply.have got both cables in at same timeGo to "control panel/system/device manager/cd/dvd drives" and remove all devices listed. Shut down computer and restart. Might be advisable initially to do this process with your external unplugged unless you absolutely know why the internal failed. If doing this process with the external does NOT resolve the issue do it again with the external plugged in (preferably to a rear USB port).What is your OPERATING system? In device manager when you are there are there any yellow symbols on anything? truenorth