Motherboard or BIOS causing PC to freeze.

I need help. Recently my computer has not been able to detect an internet connection. After fruitless attempts to reset the MAC and IP address, as well as unplgging and replugging multiple things, ethernet, power, and co-ax, nothing worked. Suddenly, I try to start my computer, and now it freezes as it boots up the bios. At first it froze randomly, now it stops at the ACPI controller. I cannot get into the boot menu, it simply will not let me. I believe it to be either the bios, or the mobo. If anyone has any insight to this problem, any help would be appreciated.

Specs:
250 Western Digital Caviar HD
ASUS A8N-SLI Socket 939 Mobo
Athlon 64 X2 3800+
1 gig of DDR400 Kingston RAM
NVidia GeForce 7800 GT

All of which I believe to be reliable.. I guess not.

I dunno if it's because the Western Digital HDD starts up late and is not detected immediatly by the bios. I had that problem once where my Maxtor HDD started up before the WD one, and the WD was just ignored, so each time I start up the computer, I have to enter bios setup to make it detect the WD HDD. It won't hurt to try that out.

Remove all devices except what you need to boot. IF it doesnt boot you're looking at a bad bios or mobo issue. If it does boot keep adding things in until it works.

problem solved with RTC and CMOS reset.