Nintendo 64 Power Supply Not Working //top\\
If you plug a 110v N64 power supply into a 220v outlet, you will hear a loud POP , see a puff of smoke, and the internal varistor (a sacrificial protection component) will explode. The console is likely fine, but the power brick is destroyed.
If you have confirmed the outlet and the brick are functional (or you are testing with a new adapter) and the console is still dead, the issue is likely internal. nintendo 64 power supply not working