So i was working on a project in which I had to use an ADC. I used WiringPi's Python modules to do so. For testing the ADC, I attached a 100k pot to its input pin, supplied it about 20V but used the Pi's GND pin to ground the pot. The Pi stopped working after sometime and the CPU heats up very quickly when powered ON, and the 'ACT' LED is not glowing / glowing very faintly (although the other LEDs do light up when i attach an ethernet cable). So is my Pi bricked ?? And am I eligible for a replacement under its warranty ?
P.S.: I did do the usual hardware tests listed here, and I get the the voltage difference between the two terminals of the F3 polyfuse to be sometimes less than 0.3V and sometimes greater than 0.3V.