I have a HTC M8 from sprint. I used the All-In-One to root and flash the custom recovery ( Clockwork Mod Sprint)
I left s-on and just wanted to try the stock rom out for a few days. After about a week it started and never ending reboot. It would boot up and load the OS like normal and after about 2 to 5 min it would reboot again. Tried clearing the cache and that resolved the issue for about a day. It then started same thing again. At this point i decided to try ardh. After reading thru arhd post and downloading I made a bone headed mistake of NOT running a backup. I used the "Clean to install a new rom" option and then went to install the rom from the external sd card. it got to about 70% and failed out. I re download and tried again and got the same results. I then tried Viper one, Redbulled, and a few others. No matter what rom i tried it would fail.
Now at this point I realized what a dumb move it was to not run a backup. Started searching here and the great interwebz for how to fix this.
I tried to sideload the roms and they tanked.
Does anyone have a few pointers or ideas on how to fix this.