Hello, I have a problem with the button to turn on my mountain bike it’s been a few days that is intermittently broken (I have to press many times for that to turn on the bike. today despite hours trying to power it up c is impossible. when I plug the charger into the battery, the control screen turns on impossible to turn on the bike today, a false contact in the electrical harness, I disassembled, check and clean a large part of the system but this did not solve this problem.