Cant get line in to work

[APM1_2_3]

I am using audacity and want to record through the line in jack socket. It doesn't work at all. I have used this method on older hp laptops without any problem. 

[WAWood]

@APM1_2_3 

Perhaps this will help:  https://manual.audacityteam.org/man/faq_recording_how_to_s.html

[APM1_2_3]

Thank you for your reply, I have tried all these options but I think the issue is with the laptop. I have two of these identical and line in always has a red cross on it in sound settings. All help is appreciated.