CommentStreams:62b1a450e0308db2294f9a9abb71a0fb

had the same problem, the Raspberry starts briefly and switches off again. After trying for a long time, it worked again using the following procedure. 1. Disconnect the X728 from the Raspberry and remove the batteries 2. Put the X728 back on the Raspberry 3. Insert the batteries (Raspberry must not start, it did it for me every now and then, then start all over again) 3. USB-C charger on connect the X728 4. Switch on X728. Since then everything has been working normally again. Hope it helps with you too.