Can't Switch Audio Output After Video Card Upgrade

HP pavilion A6040n
Windows 8.1 32-bit

I was trying to run Quicken 2015 on my computer and the screen would flicker and then Windows would log out. When I log back in, any program that I had opened would be closed.

on a whim, I added a video card to see if that would fix the problem. That appears to have fixed the problem.

However, now my sound isn't working properly. I have 2 devices that I output sound to (for some computer functions I use one, for other computer functions I use the other). The 2 devices are a TV and a headset. In order to get the headset to work, I have to go into the bios and enable the on board audio. When I do that, only the headset works. In order to get the speakers in the HDMI monitor to work, I have to go back into the bios and change the on board sound to "auto."

The video card is an MSI Radeon R7 240. This video card is PCI-e 3.0 16x and the motherboard slot that I am using is for PCI-e 16x.

 

sorry this is a tad late...
the simplest thing might be to buy a cheap sound card. amazon has pages and pages of sound cards.
if an add-on sound card fixes your issue, then you might be looking at a bigger problem. in that...
the on-board video was solved with an add-on video card, and if the on-board sound was solved
with an add-on sound card, your motherboard, itself, is most likely having problems.
just make sure you have backups of anything important.
good luck with it.