What happens if you do not unplug and replug the power cord?
it doesn't start there are lights on motherboard but it doesn't start
Is XMP enabled on your bios?
no xmp in my bios man
When did the problem start? Any change in hardware, or software? Try resetting the bios and setting the ram frequency and timings manually.
i have the pc since 2 years and now 2 months ago problem started no software changed i changed graphics card because it was crashed and changed hdd for test but it wa the same ... how to reset bios and setting of ram frequency