Have an Asus laptop K70IC with a Slimtype DS4E1S SCSI CD Rom device. Problem is, it only recognizes and plays DVDs and Blue Ray, No factory Music CDs. It will play a program disc but no music discs. It used to play music CDs but sometime recently it stopped. Says does not detect a disc,insert a disc, but trying various discs, no music CDs recognized or play. I downloaded and installed the newest firmware from Asus, but still the same. As the DVDs play, it seems like a software issue has occured. Have begun uninstalling CD/DVD software but so far haven't hit upon a solution. Also tried Win7 codec pack= no change. Tried K-lite codec pak=still no fix. Any suggestions, ideas?