What happens when the indicator flashes after the sketchpad is plugged into the computer?

What brand are you? If it's Wookiee or WACOM's, it shouldn't flash. When you put pen to paper, the extension should always open and blink. Tomoji lights up when I put pen to paper, but it doesn't seem to light up when I don't put pen to paper. There is a small icon in the lower right corner of the desktop. Just after plugging in the board, it usually flashes a few times, and then it will be normal; If you don't move the chessboard, it will keep flashing. These two models, it should be that the thread is not plugged in, and it does not flash after plugging in.