i've had my computer for 4 years and using the same motherboard and last night i just turned it on this morning i turned it on and it went to the 9.C and does not turn on either.
tried to do what you said in the steps but still no luck, i cant even get the cd drive open or any thing. it just makes a beep sound and wont turn on
just one BEEEEEEEP
could be a memory error. try switching out the memory modules, if u have more then 1 switch one with the other. its an easy test wont take long. next thing i would do is swap out the power supplies, if u have an extra one you can get ur hands on.