Cpu Wont Start Up, Buzzing Noise

I have an emachines t2792 cpu. It has an 2. 7ghz intel celeron processor, 256mb ram, and an 80gb hard drive. It is just under 2 years old. All of a sudden, the cpu will not power up. There is a low buzzing noise and no lights that come on or even flicker. It is plugged into a surge protector. Is there anything i can test on my own? I'm trying to avoid hefty diagnostic fees.

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