DL4100 - Where can I get the MainLogic

DL4100 - Where can I get the MainLogic, mine got damaged.
Only turn on the screen blue, the LEDs of the discs, give as 3 or 4 blinks when starting the computer after they remain fixed in blue, the power LED does not turn on.
If the discs are heard, although I had to stick the ear to the equipment, since this fan does not let them hear.
I had already restarted it, also restart it with the reset button, but it has no effect.