Based on the problem description, it looks like a BIOS problem, this does not sound as onboard graphics controller issue. I would say that your BIOS is not powering on the internal graphics (Intel), I recommend contacting your computer manufacturer for information about BIOS settings or update your computer BIOS, it may help.
I have just checked your processor model and the i7-740QM, this processor does not come with onboard graphics solution. I believe this is why "Optimus" feature does not work. In other words, the computer will work with discrete graphics only.
Please check processor specifications below: