just got given a nicer case for my computer and swapped everything in but now my video card i'snt working through the s-video output (only through monitor) and my sound is all garbled.

I have a 2.4gig p4 cpu
abit is7 motherboard
1gig ram
radeon 9550 256mg agp video card
crappy old c-media pci sound card with game port.
the transplant seemed to go fairly smoothly but I accidentally reset the bios in the process. and ALSO getting the video card in was fairly difficult (very tight fit with case) and cant be removed easily. i don't think I damaged any hardware. at least I hope not . please help me.
These issues are USUALLY handled by the OS and your drivers.

If you are still using the same hard drive, there should have been no change caused by switching CASES. The BIOS reset should not affect it either.

Normally you go to Display Properties to set how you want your video device to handle multiple monitors/displays.

You can go into BIOS to see if it has options on Display PRIORITIES and see if there is something that needs to be set again.

I once had choppy sound that was fixed by setting my BIOS settings to Turbo and Fast instead of Normal and OPTIMIZED or Fail Safe.

Otherwise try to reinstall your sound card driver.thanks for suggestions.
got sound working by swapping its slot but still no video through t.v.
I'm going to try a different video card.