Hello Peterglass, it is important to know that HD3000 supports dual display only.
So the behavior you are experiencing is totally expected. You will be able to use the built in display and an additional monitor.
Please check the following article with some triple display configuration Graphics Drivers — Configuration 3-Displays FAQ
Can I replace the graphics card currently in my laptop computer with a graphics card that will support the two additional displays, so that all three monitors show the same image?
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Peterglass it will be necessary to contact Lenovo so you can check with them if this is possible.
Thanks, Sylvia -
You're welcome Peter.