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- HP Elitebook 840 not detecting external monitor

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04-18-2017 08:08 AM
Product: Elitebook 840
Operating System: Microsoft Windows 7 (64-bit)
I have an HP Elitebook 840 running Windows 7 Enterprise (64-bit) that is not detecting my external monitors. I have downloaded the latest drivers for the monitors. When I first plug it into the USB port, it flashes on, but then it doesn't detect it. I have tried fn+F4 and "setup computer to use multiple monitors". These monitors work well with my other laptop (using the same cables). The monitors I am using are HP EliteDisplay S140u and HP U160.

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