This message was posted on behalf of Intel Corporation
The following video ports are supported by the Intel® HD graphics 4600
Intel recommends using straight video cables when using multi-monitor features.
I would suggest contacting Lenovo for information about the type of video adapters supported by your computer model.
Additionally, you need to check if by using adapters will enable extended desktop feature.
Thanks for the info. Actually, my laptop only got one HDMI output. I may ask from Lenovo community about my problem.