The fishfinder/depthfinder on my 19 foot Bayliner has recently quit working. I know there is power going to it, because when I turn it on, I can here a beep from the on button, the problem is there is no video, the screen shows nothing, like it is not coming on. Could this be a problem with the transducer, or only the actual device?<br /><br />Also, my speedometer and tachometer both quit working, is it possible that there could be a connection?<br /><br />The boat is a 1986 19' Bayliner Capri with a 1986 125 HP Force outboard. I do not know the model of the fishfinder or guages off hand, but will look if that info is needed. Thank You.