I just got my iOSD Mark II and successfully make it work with my A2 and my own video transmitter and ccd cam which needed some tinkering of the wiring. In the process of trying a couple combination of video transmitter and ccd cam I've accidentally shorted the ground wire and POWER of the unit. From further investigation I found (I believe) a transistor seems to be burnt. I'm planning to try repair it myself as I have the right tools in my workshop but need help to recognising the burnt component value.