bonjours
je viens de voire dans le livre de la carte mere et je me demande si ca ne serais pas a l origine du probleme
-USB DEVICE WAKE-UP(3-PIN USB PW12,USBPW34,USBPW56)
set these jumpers to +5v to wake up the computer from s1 sleep mode (cpu stopped, dram refreshed, system running in low power mode) using the connected usb devices.Set to +5vsb to wake up from S3 and S4 sleep modes (no power to cpu ,dram in slow refresh, power supply in reduced power mode)
the usbpwr12 and usbpwr34 jumpers are for the rear usb ports.the usbpwr56 and usbpwr78 jumpers is for the internal usb connerctors that you can connect to additional usb port