I have a Lenovo G50-45 80E301GUUS with AMD A8-6410 APU with AMD Radeon R5 Graphics. It has a clean Windows 8.1-32 bit installed on it (NOT the factory image...the drive partitions got wiped and Lenovo wants to charge for the CD which I refuse on principle).
The current display driver is not capable of sending the screen to another monitor:
Your PC can't project to another screen. Try reinstalling the driver or using a different video card.
Device Manager it says
Microsoft Basic Display Adapter, which is said to be up to date if I try the update (although the driver date is 6/21/2006!).
The Lenovo site does not offer a display driver for this machine (Windows 8.1 - 32 bit), that I can find.
The AMD site offers some drivers, but I have not been able to get any that are compatible. I have tried radeon-crimson and amd-catalyst. I managed to get to a list of drivers by using the "have disk" option, but there was no R5 6410 in the list, and the other R5's I tried came back with a message about not being compatible.