Will replacing my motherboard fix my sound and Internet problems?

Q: Will replacing the motherboard on my Dell Dimension 8400 running Windows XP – SP3 resolve the following problems which occurred after what I believe to be a surge protector failure. I did replace the surge protector.

After the monitor went blank, I replaced the graphics card and restored the monitor, however, I had no sound. I replaced the sound card but that did not restore the sound. I tested the speakers and they are working.

I am no longer able to send and receive faxes.

My computer still runs the computer applications and accesses the internet