My board is back! 
I changed to 12V connector and it works. On the 5 V molex which I used before no current gets pulled at all. Seems you are right, the fuse is gone. Don't know how this could have happend. I am using a standard PC power supply....
Maybee under 5V voltage drop? The current gets higher if the voltage drops and fuses are likely to burn?
Can you give me the position and data of the fuse? I can relace it by myself - less hassle comparing to sending the board back and forward through the customs...
Is it the part with the "w" on it?
I changed to 12V connector and it works. On the 5 V molex which I used before no current gets pulled at all. Seems you are right, the fuse is gone. Don't know how this could have happend. I am using a standard PC power supply....
Maybee under 5V voltage drop? The current gets higher if the voltage drops and fuses are likely to burn?
Can you give me the position and data of the fuse? I can relace it by myself - less hassle comparing to sending the board back and forward through the customs...
Is it the part with the "w" on it?
Awesome! Yep, the fuse is the part with the W on it. You'll notice that there's one on each input. I think you're right that the voltage probably dropped and the current rose to keep up. The fuse is Bourns SF-1206S400-2 available from Digikey here for $0.68. If your power supply is regularly putting out a slightly low voltage, you might want to consider installing the 5A part or switch from 5V to 12V on the Molex connector.
Again, I'm sorry this happened but I'm glad to hear it's a pretty easy fix!