lamiricore

i try to hold the menu button but the engineering menu is not appearing

I already try to disconnect the battery for one minute, would it change something to disconnect it for a couple of hours ?

I already try this but the screen is black and nothing happens when i plug the drive

Thanks @djmartzian for your answer. Unfortunately The eeprom memory rewrite option seems to be out of my range so i prefer find someone that can do that. I'm located in France next to Rennes so maybe someone has a contact to give me ?

i just try to upgrade my firmware to 1941. I perfectly follow the tutorial, engine off as it was advised. I was running the update from 10 minutes and suddenly the warning for the low battery appears on the screen. And then the power went off and stop suddenly the update. The update was at stage 2, updating the CPU... After restarting the engine and repowering the battery i try to restart the infotainment but nothing happens, i just have a black screen. I probably brick the infotainment so it's a bad news because it should be quite expensive to change or repair it but if somebody has an eventuel advice to try to fix it by myself it would be nice. thanks.