Operation of ON/OFF buttons on computer cases
anonyme
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anonyme -
anonyme -
Hello everyone, I have an ATX tower (A-Open) in excellent condition that used to have an old ASUS motherboard (K6-2) which was still working. After replacing it with a new power supply (CORSAIR CX500), I installed a GIGABYTE motherboard (GA-M68M-SP2), but it never powered on; nothing lights up and no fans spin, the same goes for an ASROCK N68-S motherboard. So I tested the power button to see if it was working properly. However, it closes fine on the first press of the button but immediately reopens, hence my question: Is there a standard for these power buttons since my old motherboard works fine? I mounted the GIGABYTE and ASROCK in another case without any operational issues, so it seems there is a problem with the Aopen tower and most likely with this power button. Thank you for your response.
2 réponses
Thank you Serge for your good advice. This allowed me to learn a bit more about the subtleties of computers and their security. After furthering my investigations while following your guidelines, the motherboard unfortunately remained down. I then proceeded the "old-fashioned way" by unplugging everything that was connected to the motherboard one by one and restarting the computer after each manipulation. I finally found where the problem was coming from; it wasn't due to the malfunctioning of the On/Off button, but simply from the USB2 ports located at the back of the case that were directly connected to the motherboard on the designated ports. The pinout must have been different, causing the Asrock and Gigabyte motherboards to go into safety mode by not starting. Yet another problem solved; we sometimes have cold sweats thinking about one or more damaged components. Fortunately, manufacturers often anticipate user errors by including a safety mode in computers.
Hello, the power button is just a push button (so it’s normal for it to return to its position), it provides a signal to start the power supply via the motherboard. Your button should be connected to the PW-SW on the motherboard, then when contact is made, the signal is sent to the power supply on PS_ON which makes it start. In your issue, it seems that either the button or the wires going to the motherboard have a problem. You can test by using the reset button, by connecting the PWR-RST wires in place of the PW-SW wires at the motherboard, and obviously pressing the reset button instead of the power button on the PC. Have you also thought about checking the switch at the back of the case? Your motherboards work in another case so they are fine; are you using the same power supply in both cases? To start and test an ATX power supply outside of the motherboard, simply connect the green wire (PS_ON) to ground and have your power supply output to a fan for example. Best regards.