No power on your Motherboard? Check power unit or replace with a known good one. If still nothing, your motherboard most likely is dead. In rare cases the (coin) battery drained could prevent the MB from starting up.
the keyboard and the moose it 's the type ps2 ,they have functions correctly during 4 years but in the last me they are damaged at the same time. I installed the driver of the motherboard in a total way
I think that the power supply unit and the motherboard function correctly because all the peripherals and resources are fed and fonctinnes correctly (port usb, left VGA, HDMI, lecteurCD .....) - remains verifiction of the battery .....
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