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Stock rooted 4.4.2 will not boot at all
I have a Nexus 7 running stock 4.4.2 rooted rom and now it will not turn on. This device was flashed and rooted a couple of months ago.
Here the other day, when I tried to turn it on, it booted into recovery where it said no OS installed. I then rebooted, but it was still going into recovery. I turned it off and put it away for a couple of days,but now it will not boot at all. I have tried several ways like hard reboot with the power + volume down + volume up, but there is no response at all. The screen is black. I tried to charge the device, connect it to the computer, nothing happens. Running the command "ADB devices" from terminal can't find any device.
Any suggestions? Can the device suddenly just stop working due to rooting/unlocked bootloader? Could it be that there is a hardware problem?