This day at the morning, when i turn on my PC, the keyboard not worked at all, no respond from it.

I guessed  the keyboard was broke or something else, but i tested with another computer and it is work fine.

After cleaning inside my computer, remove cards and replug it, nothing help me.

I decided to think as stupid,  so i removed the battery to reset the CMOS memory, but i replaced it with new one, it is work, i mean the keyboard come from the death :D.