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I just recenly purchased a HP DC7800 and performed a fresh install of Windows 7 64bit on my system. My system specs are as follows: Intel Core 2 Duo E6550 2.33GHz, 3GB RAM, ATI Radeon 5400 Series graphics adapter. I set the PC up as normal and before I even installed any Windows updates, the sound didn't work. I get the "no speakers of headphones are plugged in" message even though they are. I checked device manager and the only two that didn't have drivers were the PCI Simple Communications Controller (which I still don't know how to fix) and another PCI related issue that seemed to be fixed by installing the Intel AMT SOL/LMS driver. Also, there is a microphone that is plugged in via USB that works. Here's a screenshot of my device manager with PCI Simple Communications Controller and my audio devices shown.
Any help you guys can provice would be helpful.
