Welcome, Newcomer. The first thing to do is to work through our standard checklist. Just follow the link in my signature and you'll be taken to the troubleshooting guide. Note that there is a link to jsc's breadboarding guide. If nothing in the troubleshooting checklist helps, follow jsc's instructions on breadboarding to rule out case shorts.
Thank you for these links, i've looked them. But i've already done nearly all of them, nothing's changed.
First, i don't have 1 standoff on my case, my motherboard needs 6 standoffs and i have only 5. For this can be problem i'll go and get 1 now.
And i decided to buy a new speaker for bios beep errors, this maybe help to find what's the problem.
But i'm still looking for more ideas about my problem.
This means problem is on the motherboard or CPU ? (i've tried psu on another computer, it's working fine.)
What's CPU Phases on the motherboard, have 4 leds that indicates CPU phases, when i start pc all of these 4 leds are light up.
And there is a led near the OC panel on motherboard, and this one lights up too.
I don't know what are these leds, manuel doesn't say much about these leds too.