No input detected on LG TV when connected to my Helix via mini-DP to HDMI adapter?

Today I tried connecting my Lenovo Thinkpad Helix to my LG 24MN43D TV using a mini-DP adapter and a separate HDMI cable, however I'm getting nothing - no input detected whatsoever on the television. Both the adapter and the cable are new.

Does anyone know what may be causing this and how I could fix this? Any help is appreciated.

Make sure that the HDMI cable is in HDMI port 1,2,3 ect, press source on remote and switch to the HDMI port you put the cable into.

Can you detect the tv in your video control panel? Gl