Its probably too late for you now as you have replaced your engine log, but when mine failed for the second time, I took the panel off and left it in the airing cupboard for a couple of days. When you reinstall it bingo, all back to normal. This winter I shall remove it when I lay the boat up, put it in a dry place, and I’m not expecting anymore probs. It seems like its a moisture thing affecting the led readout.