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Yes a DVDROM drive does have 2 lasers, 1 for the CD and other for DVDROM.
I'm not familiar with the recovery process on a Sony laptop, do you have a restore CD?
If you do, try and boot from this, if it boots off it fine, then your drive is working OK.
In this case, uninstall the DVDROM drive from device manager, followed by the secondary IDE channels.
Restart when prompted (may need to restart twice)
Regards
Kev
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