Hi franks,
I know how it feels when something isn’t working the way it should. Let’s further look into it. Is your Chromecast device plugged directly into the TV’s HDMI port? If it isn’t, where is it plugged into? Try to plug it into a different HDMI port (if there’s any) or another TV if you have one. Check if the G logo will still appear or if you can proceed with performing a factory reset.
Regards,
Alex
