Hi, I have the same problem but with my Lenovo Legion Y540. I can only see solutions for Y740. Can you help me? My laptop is experiencing black screen when I am opening it. Power button and keyboards has lights but screen is purely black. It happened after the bios update/downgrade. What would be the possible solution on this? I’m planning to buy CH341a 24-25 series. Is that compatible to my laptop? Thank you!