Here is my story : my power button was hyper sensitive and locked/unlocked/rebooted my SGS3 by itself, sometimes even when I didn't touch it. I could not use my phone anymore, so I searched for a way to fix it, and I found out that it was a hardware problem. I carefully opened my phone and physically removed the power switch. To turn my phone on, I had to plug a charger/usb cable in, plug it out and immediately pull my battery out and in.
It worked pretty much, and I then decided to reinstall the previous version of Cyanogenmod 11 which I preferred. I don't know why but something went wrong during the installation, and now I can't go further than the unlock screen. Whenever I unlock my phone, a box saying "Launcher 3 has stopped working" shows up, and reappears right after I close it. I can't access to the homescreen, the notification bar is empty and I can't access to my phone parameters. The only thing I can do is opening my agenda or the clock app by clicking the date or the hour (only things in my status bar).
Also, my phone reboots when it connects to some wifi.
I can't hard reset my S3 because I can't access to my parameters, nor to the phone app (emergency call doesn't allow me to reset the dial way). I can't reboot in recovery or download mode because I don't have a power button anymore. ADB tools don't detect my phone (I installed the SGS3 drivers on my pc), and my computer only detects an empty phone.
The warranty is over so I can't just send it to Samsung.
Is there a way to reset my Galaxy S3 or just boot it in recovery or download mode so I can install a clean ROM via CWM or Odin ?
Thank you for your time,