[SOLVED]I'll first clarify that I'm asking this after doing much research but not finding anything.. My problem is that my kindle 4.0 nt got bricked on DIAGS MODE and the screen is frozen. I've tried holding the power button but nothing, the orange light (when conected) goes off after 15 seconds and holding up to 30 seconds and 1min 30 seconds does not help. All i've found wasn't any use. My kindle was fully charged before it got bricked so i dont think the problem is because of low battery. Maybe if there was some way of restoring it to factory settings errasing everything or something
SOLUTION: Using kubrick, the download was very slow so I used JDownloader. Once I burnt the iso and booted from it the process was very simple and fast and my kindle is now unbricked plus I had the option of Jailbreaking it from kubrick.