Transistors normally have three pins (see the larger one near it), this could be a resistor, diode or a fuse, which would make sense. If it's a fuse, you could try to bridge it with a short cable, or by soldering. This could work, a long there's no reason for the no more existing fuse to melt (means overcurrent again).
Is L22 printed on the PCB or on the burnt fuse(?)?
Does anybody know what kind of parts are normally tagged with Lnn?