Dear sir
in fact i diged out the internet searching for the manual that you mentioned above but nothing i got ... but there is a good point i found the HP640V manual on the address http://search.hp.com/query.html?sh=1&charset=UTF-8&la=en&qt=HP%20dvd640v%20DVD%20Writer%20640%20vi
and you can open a similar product catalog to find out the answer
for your questions .... from the sit www.HP.com
thank you and good luck
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