It's my sister's laptop and I just got a new HDMI cable for her.
After she connected the laptop to her LCD TV, she found out that pressing Fn+F5 doens't work at all, both TV and laptop screen didn't change at all.
There are two HDMI port on her TV and she has tried to switch the input between them, that doesn't work also.
So, is there any way to help this situation? My sister doens't live in the city with me, so I can only help her through the internet. Any suggestions are greatly appreciated:)
ps. the OS is windows xp.