Hi guys I'm rooting, unlocking and flashing Smartphones since 7 years and I know what fastboot adb etc is but a friend gave me his HTC One because he bricked it. I also have a HTC One and One Max and have all USB Drivers installed and my One is changing to "Fastboot USB" but his phone isn't. Also TWRP is not starting. I can see the splash Screen of TWRP but its rebooting.
Also ADB is not working neither in fastboot nor when bootlooping.
Is it somehow possible to flash a stock rru without adb and fastboot working.
And what is the mode when connecting to the usb cable by Holding vol up+down. There is a red light active and i can find a "Android device" in Device Manager.
I hope someone can help me