What is the reason the computer will not turn on?

Users questions:Computer power is switched on, press the start button can be connected to power, but can not hear the computer beep is heard, is the normal boot the computer voice, nothing. CPU fan also rotates to display that there is no response has always been black , displays the first few seconds when the light is green it, but wait a while refer toLight show will become a stand-by Zhuang too. I would also open the case to insert graphics from the first over. Memory is the same, but still not work. But even the shutdown will not work, but also pulled off the power before they can off the computer, is this what is the problem? How like it can handle well?
Experts answer: Empty COMS, that is, the COMS to take off the battery for some time, and then install, if not do so, we must suspect that the power supply problem, find a replacement power supply about the same.
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