In Windows 7, CD/DVD-Rom Drive sign of IdeaPad Z470 gets lost automatically in "Computer" window.
The above symptom may occur on the following software:
Running the following software:
Lenovo Energy Management 6.0
(1) In "Device Manager", there is no recognizable "CD/DVD-Rom drives" and there is also no relevant "exclamation mark" or "question mark".
(2) In this situation, open "Lenovo Energy Management", you will find that "Smart Optical Control" has been enabled. Uncheck "Smart Optical Control" checkbox.
Not all Lenovo Energy Manage have the "Smart Optical Control" option. Different version of Lenovo Energy Management may have different interface.
(3)CD/DVD-Rom Drive sign appears and this problem is resolved.
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