First off, the motherboard is a Tyan Thunder K7 S2462. Everytime I turn it on, POST beeps 4 short beeps. From what I know, it's a system timer failure, but then again it could be something else. I just recently bought new RAM to try and resolve the problem, but it still gives me the same error. Could my mobo be dead?! Also, I bought a new CMOS battery and replaced the old one. My HDD and Optical drivers are fine. At one time I had it working, and I reinstalled my OS and thought everything was OK. Later that day, I turn it on and again the four POST beeps.