Help on LiteON SHW-1635S can read and burn DVD's but not CD's

My LiteON SHW-1635S was working fine with CD-R, CD-RW and CD-ROM until yesterday when it started rejecting CD’s. I tried different brands of CD-R, CD-RW and CDROM. Most of the CD Media Brand were LiteON recommended I read from its manual. When you insert CD the drive doesnt accept the media, it makes a sound for a while then it stops. then nothing happens. I tried DVD’s and it works fine. It reads DVD’s and burn them. Im using the latest firmware YS0W. Please help me on any sugestion on what to do.

From reading forum info these CD/DVD drives have 2 lasers, a CD laser and a DVD laser. Seems your CD laser has failed.