Customer Problem: My GM MDI2 interface just stopped working, and it won’t connect anymore. It kept flashing to red on the 3 light, and then stayed beeping loud. Obdiitool.co.uk engineer solution: The reason is that the device was not detected. Please reinstall the GM MDI2 Manager. Here is the related free download link: https://mega.nz/#!tFxhBYCD!agbcrCKJL5PRNiNNEw6Vj7JnsWz0F3ekuChliyeZpRs It’s very easy to install, just click next…next…next… It will install successfully!