G570 4334 Digital signal out through VGA?

I have the Lenovo G570 4334 laptop - My question: Does this laptop support digital signal output through the VGA port? If it does, do I have to access through the CMOS to turn it on or is it accessible through Windows 7?
Thanks in advance for your help.
Best... 

Thank you for your reply Jin Li.
I have another question - Why does this cable exist? VGA to HDMI It includes a disclaimer in the description - 
NOTE: Your Video card must support digital signal output through VGA port function. Please consult with your VGA card's user manual for more information.
If you read some of the customer reviews, it works well for some and not at all for others.
I suppose I could just buy the cable, it's cheap enough that it wouldn't be a problem if it does not work. I'm just trying to do my homework. 
Thanks again for your help.
Bill

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