What should I do with WinXP Auto Standby?

has been using a normal WinXP computer, after the original motherboard is broken, the user replaced a new motherboard. However, during the operation, I found that the computer often stands by automatically. How to fix this fault?

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Solution:
This problem should be compatible between hardware and software, specifically the operating system does not correctly identify the motherboard, it is recommended to reload Operating system, and reinstall the motherboard driver, the general problem can be solved.
This is the way to solve the automatic standby of WinXP computer. If you have encountered this problem, you may wish to reinstall your operating system once, and you may be able to solve it.