Hp G72-B66US mic problems

Hey Everyone,
I have experienced issues with my internal microphone after upgrading to Windows 7. I have a 17.3 inch G72-B66US laptop. I have redownloaded the driver related to the RealTek sound system but that did not seem to solve anything. I also went into the control Panel to test the mic out but the green bar next to the icon would not budge even when i scream at it. Is there any other way to diagnose the problem and potentially solve my issue? Thanks in advance!

You have to do a little detective work and cross-reference in the Manual but based on your processor (i3-370M), which is used on all models and the specs which say you have the Intel HD graphics (aka UMA) you have Model 1.2 because only Model 1.2 can use that combination of features. Only Models 1.1 and 1.2 can support 2 x 4 gigs of RAM. It is DDR3-1333 SO-DIMM but downclocks to 1066 speed. 
It appears you already have the Service Manual but just in case here it is:
Manual
Bottom line, you can upgrade to 8 gigs but will have to toss the 2 x 2 gig modules that came with the system. And you do not have to use the HP parts. This will work:
http://www.crucial.com/usa/en/memory/ct2k4g3s1339m
Memory has spiked up in price in recent months so this is not a good time to buy memory.
If this is "the Answer" please click "Accept as Solution" to help others find it. 

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