Nguyen Minh Dung said:
Your airline will be the one to ask this question. They may have restrictions on weight or dimensions of carry-on luggage. Call them up and see what they say.
As far as I know, the dimension and weight are ok with the airline. What I wonder is how to carry my pc. Should I remove all the parts or how should i do it?
Like I said, this is best answered by the airline. They are aware of any/all restrictions and are best suited to give you advice on how, if at all, to bring it aboard the plane.