Medion (Lenovo) Lifetab E10310 bricked
I've tried to lower the minimum value of the screen brightness of my new Medion tablet. I found a thread on another forum (I can't post the link) that explains that "Editing /system/build.prop and changing the ro.lcd_min_brightness property may work. That property may not exist in your file (It doesn't in the file for my GS3), in which case it will default to 20. Lower numbers mean lower brightness."
I have applied that method. I have just edited the /system/build.prop file to add the line "ro.lcd_min_brightness=5" at the end of the file. To do the edits, I have copied the file in a r/w directory, edited it, and copied it back on /system, mounted in r/w mode. Then I have changed back the /system partition to read-only, and rebooted. Now, the tablet doesn't boot any more. I can see the MEDION logo, then the LIFETAB logo, but that one stays on screen forever. I don't understand why a so minor modification can have a so disastrous effect. Have I missed something? Perhaps the owner or permissions of the file have changed in the process? Anyway, the result is catastrophic.
It's the first time I brick a device, and I'm not expert, but I suppose there is no simple trick to unbrick it. Is it a more or less universal method to unbrick an android device? I've searched the forums, without luck.
My tablet is a rooted Medion Lifetab E10310 (probably a rebranded Lenovo tablet).
Any help will be much appreciated.