HI, I installed the hacked firmware on my gt3c and it boots up fine when connected to the ST Link programmer but if I try connecting to the microUSB the screen flickers and the controller beeps. It's like it's in a reboot loop and I am not able to do anything in the menus as it cycles very quickly. Unfortunately, my battery is currently dead and I am waiting for a new one from China. Not sure if that has something to do with it but I was able to power the controller fine with a small usb battery bank and the micro USB port. Has anyone else seen this behavior? Also, the firmware seems to be flashed OK although my ST Link is now on the fritz and is not recognized by Windows ... otherwise I would try reflashing.