I also am having trouble with the power button. 03zx225 w/ hpdi. Unfortunately, we found this problem while getting ready to launch for a team tourney, yesterday. When the power button is pressed, it lights up for 1 second, then goes out. There is power to the engine, trolling motor, and fuse panel, but nothing on the power board works....livewell pumps/recirc, electronics, lights, bilge. The previous owner of the boat had replaced 1 of 3 relays, located under the console, but Im not sure what it controlled. Still waiting to hear back from him. Was curious to know if sceetors panel lit up momentarily, or if it was totally dead...?