Turn on power nothing on my monitor, bla...

you semm have replaced any component in your motherboard eccept two, monitor and motherboard itself. try to put your new component in similar mother board begining with cpu ram vga, and put in output in same monitor (you must be hure that second motherboard is working) if nothing is coming try second monitor for output, if nothing is coming and have maybe beeps, one of your component that you have puted is defektive so try to replace them one by one. is not necesary to buy new component just try in other friend eith his parts afterthat if you finded defekyive component replace it in *********** board, (or if *********** board is defektive you must replace him, or monitor too if the problem is in monitor)