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Unexpected power on


New Member
Hello there.

I'm troubleshooting a Windows 8.1 HTPC (ASrock Vision 3D 252B) that sometimes starts up on his own.

Unexpected power on seem to be periodical, but checking scheduler, registry and BIOS, there's no scheduled power on.

It's connected to a SmartTV via HDMI, but unexpected power on happen also when SmartTV is off, so I think this is not a cause.

This computer is often powered on via WoL but, if there's no stange packets coming, i think this is not a cause, too.

I've just been disabling RTC Wake Up in BIOS, I have no idea what this feature is.

How can I better troubleshoot this problem?

Thanks and best regards.

My Computer

System One

  • OS
    Windows 8 Pro


slightly off center
VIP Member
Gold Member
RTC Wake up is Real Time Clock wake up. You set a time that you want the PC to turn on at and when the BIOS clock hits that Time the PC will turn on. At one time I had my desktop PC set to turn on at 7 AM everyday. My coffee machine started at 6:50 AM. ;)

That motherboard also had power on by keyboard or mouse options. I have my HTPC setup so if I click a button on the trackball it turns on. If my wife is cleaning around our TV the PC sometimes powers up by accident.

EDIT: Another BIOS option to check is power on state or state after a power failure. If its set to on and you get a power bump in your PC will turn on automatically.

My Computer

System One

  • OS
    Windows 10 Education 64 Bit
    Computer type
    System Manufacturer/Model
    AMD Phenom II X4 980 Black Edition Deneb 3.7GHz
    ASUS M4N68T-M V2 µATX Motherboard
    8GB 4GBx2 Kingston PC10600 DDR3 1333 Memory
    Graphics Card(s)
    NVIDIA Geforce GT640 2 Gig DDR3 PCIe
    Sound Card
    VIA VT1708s High Definition Audio 8-channel Onboard
    Monitor(s) Displays
    22" LG E2242 1080p and 2 19" I-INC AG191D
    Screen Resolution
    1280x1024 - 1920x1080 - 1280x1024
    Hard Drives
    Crucial MX100 256 GB SSD and 500 GB WD Blue SATA
    Thermaltake TR 620
    Power Up Black ATX Mid-Tower Case
    Stock heatsink fan
    Logitech Wireless K350 Wave
    Logitech M570 Trackball and T650 TouchPad
    Internet Speed
    80 Mbps Down 30 Mbps Up
    Internet Explorer 11
    Windows Defender
    Other Info
    HP DVD1040e Lightscribe - External USB2

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