[Need Help Identifying a Component On Psu]

Yes, i looked up a lot of information of diodes.

There are so many kinds of diodes that looked like the same. 

I don't think we can tell which kind of it by its appearance. 

[Need Help Identifying a Component On Psu]

Here is the image of the component 

[Need Help Identifying a Component On Psu]

Recently i picked up an OG xbox and found it cannot be powered up.

i think mine is 1.4 version and PSU is Delta (100V~ 127V)

First i found that the fuse is burn out so i replaced a same one. But when i plunged  in the new fuse burn too. 

After testing it with multimeter, I found that a component is shorted and needed to be replaced but i don't know that kind of diode is it. 

On the board it's written "D904."

Can someone help me identifying what diode is it ?