Hey What's Wrong?
 

i just install 10.5.5 on my Dell
bu the problem is that there is no internet or sound
please someone help me

what is your LAN and Sound Card? which version of OS X did you install, which distro? what is your hardware?

we need to know all this stuff before we can help you...

Yeah, we need a little more information before we can help you. We need to know at least the model of your computer and more specifically, the ethernet and sound card models.

Your description of the problem is kind of like going to a doctor and saying "I have a pain. What is wrong with me?" and expecting him to diagnose you properly on that much info.

actually, we need on this forum some Sticky thread advising about this