Recently I was using raspberry pi which was working fine. I tried to use GSM module with it and powered it using the 3.3V pin of raspberry pi and suddenly my raspberry pi rebooted and after it gained power again, there was no activity i.e keyboard and mouse were not working(display was there). I rebooted it again but the display was gone and still I have no display.
Plus when I connected GSM module it was also powered up with a 6.6V external power supply which I later checked was also available on the ports through which I tried to gave 3.3V to GSM from Raspberry.
I think the voltage backfired.
IS my raspberry pi dead. ANY HELP PLEASE!!!!!!!!!