My G and H arent the most functional.
A "factory reset" would be to re-flash the Edison module. You can flash the Yocto image again using the Flash Tool Lite. You can download it from the following site: IoT - Intel® Edison Board Download | Intel® Developer Zone. The Yocto image can be downloaded from the following link: http://downloadmirror.intel.com/25028/eng/edison-image-ww25.5-15.zip