Help

In the beginning the keyboard no reaction, both in usb and PS/2 keyboard, it is just no reaction!
Then it failed to start, and first i just let it repair by itself, but during that process it bluescreened, and i am not taking down the error code.
and now i can not get into bios and safe mode.
What should i do? It will be appreciatede if anyone can help!
I have already cleaned the memory card and video card!

My guess would be that your MB has died maybe PSU. But go through the steps here:
http://www.computerforum.com/209946-tech-guide-diagnosing-pc-will-not-post-start.html

i agree with the guy from the previous post. it's most probably a problem with your motherboard, but on a personal note...make sure that the motherboard is screwed in properly and that none of the pins are touching the case from the bottom as it might be shorting out.