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  1. #1
    New ROGer Array
    Join Date
    Sep 2019

    Cold boot fine, warm restart hangs and STOPS the CPU FAN with Q Code 1F

    A couple of days ago I built a new system using a new C7H WiFi. This is used as a workstation with a couple of Virtual Machines, so no overclocking was applied (only DOCP standard to get the DDR4 to the nominal speed).
    The system is stable but I noticed a big problem restarting (at least 4 or 5 times already).
    When restarting from a clean installation of Windows, after the operating system is finishing shutting down and the system should reboot, the monitor gets dark, the system hangs and the CPU FAN STOPS.
    The Q code shown on the C7H diagnostic display is 1F.
    Waiting for up to a minute will not change anything - the system seems stuck and will not try to reboot, only the CPU cooler metal sink gets pretty warm (because of the stoped CPU FAN).
    Turning off the power (by long pressing the power button on the case) and turning on power once again will boot the system normaly.
    This system should run 24/7 but now I'm afraid of Windows updates and automatic nightly restarts (to apply windows updates). If the system will hang with the CPU FAN STOPPED during an automatic update, I'm afraid the CPU would get cooked.

    Ryzen 3900X on a C7H Wifi, 2703 bios. stock cooler connected to the CPU_FAN plug on the MB, PWM mode / standard profile, spins and reports fine in AI Suite 3
    RAM: Corsair Vengeance 3200Mhz 2x16 GB (CMK32GX4M2B3200C16).
    Video: Asus GT 1030 SL BRK
    Samsung 970 Pro 1 Tb Nvme

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