Turning On Then Off By Itself When Powered
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=7512
Printed Date: 27 Apr 2024 at 10:54pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Turning On Then Off By Itself When Powered
Posted By: rocky
Subject: Turning On Then Off By Itself When Powered
Date Posted: 30 Jan 2018 at 10:55pm
|
A recently built machine turns on by itself when UPS is turned on (starting the day) then turns off after a few seconds. After pressing the power button it turns on and works as expected. In BIOS it is set to not turn on when powered (default). There is no video card. EDIT: Turning the UPS off and on doesn't cause the problem, but leaving the UPS turned off overnight seems to cause the problem (suspecting a faulty CMOS battery). ASRock B250M Pro4 Intel Core i3-7100 CPU Corsair CX430 v2 PSU (bought years ago, shrinkwrapped) |
Replies:
Posted By: rocky
Date Posted: 31 Jan 2018 at 4:41am
|
Replaced the CMOS battery and cleared the CMOS with jumper, but the problem continues. If I turn off the UPS and wait some minutes when I turn on the UPS the PC turns on, too. The UPS continues with its checkups and the PC turns off. |
Posted By: Xaltar
Date Posted: 31 Jan 2018 at 4:54am
This is by design, when the capacitors discharge completely the "issue" will occur. It isn't anything to worry about, merely the board charging up it's capacitors in readiness for power on. This process reduces power spiking when the system is powered on and off and will increase the lifespan of your board. I would only be concerned if the system powered on with the UPS and remained on. My system does the same thing (X370 Taichi + R5 1600x) when I leave it unplugged for more than a few hours, I think there is a voltage threshold for this to trigger and it would seem that UPSes often cause this, it is just a safety feature doing it's job  Enjoy your new build. ------------- 
|
Posted By: rocky
Date Posted: 31 Jan 2018 at 6:50am
Glad to know I don't have to remove the UPS, or anything.  Have you noticed if the entire system starts the boot process, like the hard drive reading because it seems to stop abruptly? Would be nice to have a feature like this mentioned in the manual, I thought I was going to have to disassemble the whole thing. |
Posted By: rocky
Date Posted: 30 Jul 2019 at 8:25pm
|
To prevent the computer from turning off, I'm letting the capacitors charge before turning on the computer. I usually turned the computer on after the UPS is done performing its self-test, which only takes a few seconds. |
Posted By: mkaltenborn
Date Posted: 12 Feb 2020 at 7:14pm
| I am using a remote switch to cycle system power. What bios setting would allow me to cycle power and not shut down after ten seconds? |