System starts without pressing power button after power supply switch on

biosmotherboardpower

My system starts without pressing power button after power supply switch on, after that it goes to bios. but there is no problem for restart or shutdown (i always should put power switch button on)
what is the problem?
is there any jumper on motherboard for fix that?
my motherboard is too old and there is no floppy drive for update it's bios(Asus P4XP-X)
what is the best way for fix this issue?

thanks in advace

Best Answer

Check if this setting is enabled in your BIOS and disable it.

Taken from an Asus P4XP-X online manual

On site 2-26

AC PWR Loss Restart [Disabled]This allows you to set whether or not to reboot the system after powerinterruptions. [Disabled] leaves your system off while [Enabled] reboots thesystem. [Previous State] sets the system back to the state it was before the powerinterruption. Configuration options: [Disabled] [Enabled] [Previous State]

By the way, there is also a power state option

On site 2-27

Automatic Power Up [Disabled]This allows an unattended or automatic system power up. You may configure yoursystem to power up at a certain time of the day by selecting [Everyday] or at acertain time and day by selecting [By Date]. Configuration options: [Disabled][Everyday] [By Date]

Look if this option is disabled

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