Southbridge is hot, no post... motherboard is dead ?

i replaced my video card to ati 5770 and after that my computer is not posting or booting. i also tried putting my old video card and its also not working. Fans are all on, working as usual. But southbridge is getting hot. i have no clue what that suppose to mean.

i have checked video card, power supply, and hdd, they all seem to work on other computer.

i have a asus p5k motherboard. i dont have a system speaker, so i cant check my motherboard is dead or not.

Someone please help me fix this problem... Thanks in advance.
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More about southbridge post motherboard dead
  1. Try to clear the CMOS and also check this guide:
    http://www.tomshardware.com/forum/261145-31-perform-steps-posting-boot-video-problems

    Sometimes when we fiddle with the insides of the computer cables get disconnected and such, try to check the power cables to the motherboard and reseat the ram.
  2. :hello: Welcome to the forums.

    Get a system speaker. If you have a non-booting system, it is about the most valuable troubleshooting aid you can have. There is a lot of guesswork involved in troubleshooting, but without the beeps, all you can do is blindly change parts until the system works.

    South bridges can run hot normally so that by itself doesn't mean much.
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