You can actually use your multimeter's fuse to test this. Most multimeters have a 10A fuse built into the current sense circuit.
You would need to move the red lead to the 10A input (never attempt to measure voltages with this connection). Have a friend press the leads into each side of the dead fuse. Push fairly hard, you may need a block underneath to keep the heatsink from levering off the table.
With this temporary connection you can power on the supply. If the LED starts flashing, you have firmware on the board
You can also try and connect to it with a PC, depending on how patient your friend is.
With the multimeter turned on to the current sense you will also be able to see how much current it is drawing. If everything is good you can consider replacing the fuse. If it doesn't have firmware or the current exceeds 10A (and blows the multimeter current sense fuse) you can seek to get a replacement.
It takes a lot of heat to remove this fuse as it is tied to a plane. It may require two irons. You should also be able to just solder a new fuse next to the old one. A 10A blade fuse from your local auto store should also work if you don't want to wait for one in the mail.