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Bootup via Reset but not Power Switch

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11 replies

by jethro_bodine

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I have a system which will not boot up using the power switch (on/off). The power supply/fan start but the monitor screen is blank (no BIOS bootup text). However, when hitting the Reset button (after power 'on'), the system will boot up normally andstart up Windows. Could this be Mobo related, BIOS related, or what? Has me puzzled.

11 replies

by dmiles

It may be the power switch is not getting a good connection from the power plug,check the cable to the power switch and also make sure the have plug in the wall socket,you did not mention getting a post beep error code,so check the power supply switch to see if it is set correctly.
Another area to check is the memory modules to make sure they are properly seated,then troubleshoot the video card.

by imskeletor15

i would check power button and make sure that it is tightly screwed in place. it could be that the button is only being pushed in half way.

by vh_s

I think you have an old AT casing with ATX power supply.

Your motherboard itself is an ATX mobo, therefore turning on your powersupply would only supply the required power to mobo, yet didn't activate the computer.

Your reset switch is assigned the task to short-circuit the power switch on your mobo.

You could confirm this whenever you turned off your computer through shutdown in Windows. Your monitor would go into standby, without the message "You could turn off your computer safely ...", yet the powersupply fan still running.

Upgrade your casing to an ATX casing. Hope it helps.

vh_s

by @lberto

Well, it could be many things.
Open your computer cover, there are some pins where the cables of the power buttom goes.
make sure that the power cable is properly attached to the pins on the board.
Also make sure that the reset button cable is attached to the reset pins on the board and not the power on pins, it could be also posible, by mistake the reset switch is connected to the PowerOn Pin, since it is a ATX power supply it only needs a signal to start up and the reset buttom will work exactly the same as the PowerOn buttom.

Good luck,
@lberto

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