Keyboard input characters are not the same as the characters displayed

The keyboard is used all the time, I don't know why suddenly when I enter a character on the keyboard, I see another character on the screen. For example, the input is "F", which shows a true "J".

This problem may be due to a short-circuit phenomenon on the circuit board, the main manifestation of this problem is to press a key to display the same column of other characters. At this point, the user can use a multimeter or wave device to measure, detect the point of failure, repair can return to normal.