2006 226, original Faria gauges. Over the summer the speedo has been gradually dying. First the digital readout for the ft, water temp, etc would come and go and now gauge is dead, not even the back lighting with running lights on. Now the tach seems to be making a similar, slow death. At times while running, I’m getting a constant beep, look and the tach is completely dead, power boat down then back on and all is good for 20-30 mins. All other gauges are showing temps, pressure and voltage is good. Seems the constant beep is just because the gauge loses power. Novice mechanic here, just wondering if anything I should check. Possibly bad gauges or Gateway? If so where is the Gateway on the 226? Thanks