Ctrl Panel - Sound says HDMI Output device not plugged. Onboard audio is cutoff by inserting new card. DVI and HDMI outs on card provide video to dual pc monitors...how to do I get HDMI audio into my pc speakers? No BIOS options to set onboard audio, like auto-on-disable. Only Onboard Devices option in BIOS is to set Serial Port A to one of six IRQ settings or Disable. Install CD downloads latest driver and loads AMD High Definition Audio Device onto Sound, video and game controllers in Device Manager but Sound says that HDMI Output device not plugged in. How to activate? Only PCI Devices settings in BIOS is list of 18 Intel USB and/or SATA controllers and their assigned IRQs, one ATI VGA controller (probably the onboard card VGA connector) and one HD Audio Device (both have IRQs assigned.)
Your mission, should you decide to accept it, is to figure out how to get sound to my pc speakers without having to permanently remove the new video card!
MicroCenter Chat support has been unable to solve this, HP Support couldn't either (although they didn't try very hard because the pc is out of warranty, off-lease and refurbished and warrantied by Joy Systems for one year.) Joy Systems too, spent 2 hours today trying to solve the problem without success.
Their last advice was to email HIS who distributes the Radeon 5450 card. They are located in Hong Kong with an international phone number.
SOLVED!!!! I solved my own problem. Evidently when I inserted the video card, which immediately killed the onboard video, it turned off "Integrated Audio" under Deevice Options in the BIOS. While messing around with PCI Options, Onboard Devices and System Security Options, I ran across Device Options and under that it had Integrated Audio..Disabled. Once I switched to Enable and saved settings the speakers worked!
Well, hope this helps someone else who may have the same or a similar problem.