HT2801 My drive reads discs as blank and not reading music cds at all.

My drive is reading start up discs as blank and not reading music cds at all( they just spin in there until I eject them). They're clean, scratch free and ejecting with no problems. I replaced my hard drive three weeks back and need to replace programs and info.

Try
Intel-based Macs: Resetting the System Management Controller (SMC)
<http://support.apple.com/kb/HT3964>

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