I bought a Lenovo pen, but it doesn't work. Pen: Lenovo Precision Pen 2 (Laptop) Laptop: Lenovo Yoga Pro 7 I charged the pen via USB C for 5 hours until the white LED lit up. I then tried to pair the PEN with the laptop. However, this did not work. I have already pressed and held the top button for a long time, but no LED lights up. I also tried holding down the two buttons on the pen for a long time (25 seconds) but none of this worked. What should I do? Has the pen been delivered defective?