Center Channel Dead

Hello, It appears that my center channel is dead. I have the 5.1 asus xonar dg pci card, and the logitech z506 5.1 surround system. Just recently, i noticed that my center channel stopped working. I tested multiple options in the asus control panel, re installed asus drivers, and uninstalled nvidia hdmi audio drivers. It must of happened this week. This is the life of my computer last week-
1.New upgrade! hd4850-gtx 560ti goes flawlessly!
2.put a cooler in my computer that goes where a pci connector goes, and it may have made contact withe the back of my sound card. Its alot like this- http://www.newegg.com/Product/Prod [...] 6835119097, but no moving or metal parts contacted my sound card.
3.Went dual screen with 2 23" monitors, one hdmi and one dvi. I've tried disconnecting both and alternating connectors. It has worked with hdmi.
Is it possible for the card to just burn out? I can't detect any sights or smells that would indicate that. Im pretty sure my speakers are not bad.
Any ideas?
thanks
specs
680pws
2x23" monitors,both capable of sound but not using it.
gtx 560ti (thank you computing gods)
3.5x4 ghz amd phenomx2
an msi motherboard. I can look it up if needed.
8gb gskill ram

I forgot to add I'm using windows 7 64 bit

Open up the Xonar audio center. Make sure you are configured for 5.1. Also, to the right of the analog speaker settings, there is a test button that will test each speaker individually.

If you have onboard sound, try that as a test.