power up the Mobo

"ML" wrote:

> I removed the cover of the PC casing to observe these:
>
> When I switch on the wall socket power, the motherboard's yellow color LED
> come on, the CPU fan spin a while then stop (2 times).
> Note that I have not press the power button on the casing.
> If I have not even press the power button on the casing, should I see these
> activities on the motherboard?
>
> The other problem is when I press the power button on the casing, the system
> power up but it dies down. I need to press the button a 2nd time in order to
> power up the system.
>
> Could the experts give some insight to these problems? Thank you.

1234567891546327895461235632145263789587 wrote:
>
> "ML" wrote:
>
>
>>I removed the cover of the PC casing to observe these:
>>
>>When I switch on the wall socket power, the motherboard's yellow color LED
>>come on, the CPU fan spin a while then stop (2 times).
>>Note that I have not press the power button on the casing.
>>If I have not even press the power button on the casing, should I see these
>>activities on the motherboard?
>>
>>The other problem is when I press the power button on the casing, the system
>>power up but it dies down. I need to press the button a 2nd time in order to
>>power up the system.
>>
>>Could the experts give some insight to these problems? Thank you.


What make of motherboard? Everything that was described is possible
and could be normal. But the need to press the power button twice is
suspect. How does the motherboard manual describe the power on cycle?