Blown transistor on control board. Am I correct that it is probably an N-channel MOSFET? (and help identifying)
All discrete SMD components (transistors, diodes, etc.) are marked for identification. Online databases exist that tally the markings to a specific model and manufacturer. However, you've got to be sure that:

a) You've read the markings correctly;

b) You don't just pick the first result that comes up, and;

c) If the component is damaged you do not assume that the identical-looking component next to it is even remotely similar.

In this case Q1 and Q2 can be presumed to be the same, given the duplicate nature of surrounding tracks and components.

Thus, to the marking "56". After checking some datasheets suggested by the aforementioned website, it seems that this number actually denotes a manufacturing date and not its product code; the identification markings are - somewhat counter-intuitively - the smaller numbers to the right of the package. Searching for "83" in the database yields one obvious result: MMBT4400.