Aspire VN7-592G connect a CAD external Monitor [Closed]

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Hello,
I have System Model: Aspire VN7-592G with the new skaylike processor: Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz, 2601 Mhz, 4 Core(s), 8 Logical Processor(s). It is very difficult to connect a CAD external Monitor BenQ BL3200PT. I have installed latest Intel and Nvidia drivers. But the BenQ monitor shown: No signalDetected! Sometimes the BenQ monitor gives connection but this is hokus pokus. It’s not permanently. I connect the external BenQ BL3200PT via hdmi output. Can somebody help?