Hi there. New to the Scalextric forum. I have one of the Le Mans 24 hrs digital Arc pro sets.... A fantastic set, but I’ve started having problems over the weekend. it was the first time using since before Christmas. I did lots of cleaning of the track and cars appeared to be running fine, until I came to use the Arc pro app. I’ve noticed that when in race mode, one of the cars won’t trigger the lap counter. Car cannot be calibrated either. It goes round the track fine and lane change button works, but I cannot get the app to recognise the car in race mode. I’ve tried reinstalling the app twice and tried unplugging and plugging the power base with no joy. I think I’ve traced the problem to the digital plug as the problem follows the chip when I swapped it into the 2nd, which was working fine before. I’ve ordered a replacement chip, hopefully will sort the problem, but I wanted to check whether anyone else has seen a similar problem or has any advice. many thanks Andrew