I realized that my PC smelled bad because of the power unit, then it didn't boot up the next day. I thought that was due to the power unit, of course. I changed it to another power unit I had. Good! The fans and LEDs worked, however..., why? Hmm I thought it was because CPU didn't work.
Oh! gocha!
I turned the back red swith into 230 by mistake. In Japan you had to set it 115!!!
Thus, the PC has been working again! but I have to buy a PC unit because of the less capacity.

　ＰＣの電源から異臭が。。。と思ったら、翌日スイッチが入らない状態に。これはさすがに電源だろうと思って、余っていた電源パーツに取り換えて、、、よし、ファンは動くしLEDはばっちり。でも、あれ？動かない？なんだかCPUが動いていない感じ。。。
　おっと！何を思ったか裏のスイッチを230にしてた。。。日本なんだから115ジャン。
　というわけでプチ解決。でも容量足りないから完全復活するには買ってこないと(-_-;