Does not turn off motherboard power

Asrock motherboard Z77Oc Formula,after the completion of vindovs does not cease to energize percents, video, button same thing !It all started after replacing the thermal paste on the CPU, and installing another 1070 Sli.Already tried everything possible sin in the cartoon because the capacitors are all like new .Che can anyone tell me? and like it ,buy a new this is the easiest way