I have a Toshiba Tecra A50-C-U3E1 (yes I know...) with integrated Intel HD Graphics 520 GPU.

The laptop has external VGA and HDMI (supporting 1080p format apparently) ports and I am currently using one external monitor (HP ProDisplay P202) with a VGA-VGA cable. This is working with the laptop LCD with no issue at all.

I am now trying to connect a second external screen (P202) using the laptops HDMI port. The only cable I have available is HDMI-DP (The monitor only has VGA or DP), but when I plug in and open up the Windows screen properties, the system can detect the screen but cannot send a signal. The screen will scan both ports and the go into sleep mode.

I have tried a second HDMI-DP cable with the same results. I know the HD 520 will support three screens as I have checked the Intel website.

Does anyone have any ideas why this is not working?

Thanks in advance.

  • 1
    Does it work with only the HDMI screen and laptop screen? Sounds silly, but I had a similar problem where the default GPU drivers were not understood by windows and another control panel app from the GPU allowed to do what I needed to do. – LPChip Oct 6 '16 at 14:37

More than likely the cable/adapter is DP to HDMI and not the other way around. Most of these adapters are unidirectional, not bidirectional. You will need to purchase a HDMI to DP adapter.

  • The HDMI port is in the laptop and the DP port is in the screen. The cable is simply a cable, there is nothing to suggest there's anything else added to it. – Rich M Oct 8 '16 at 18:40

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.