After starting pi, the screen gets stuck at blinking cursor at uppermost left side corner. When Ctrl+alt+F2 is presssed the login prompts for very small interval & disappears and this (as shown below) goes on until ctrl+alt+F2 is pressed.
Raspbian GNU/Linux 9 raspberrypi tty2
I am not able to type login and password for. Any solution to make this prompt still so that I can type login and password.