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I am trying to connect a 15-inch Macbook Pro 2017 to a p3418HW Dell monitor, through a USB-C to HDMI adapter (VTIN 4Kx2K USB-C to HDMI). The monitor shows: "No HDMI signal from your device".

I have tried the following suggestions on the net, with NO result:

  • resetting SMC
  • resetting NVRAM
  • several times disconnecting and reconnecting power and HDMI cables with different orders

I have also tried the cable, adapter with the same monitor with a 13-inch Macbook Pro 2016 and strangely everything works well!!

Any advice is appreciated!

  • Can you post the manufacturer and model of the USB-C-to-HDMI adapter? – jaume Oct 12 at 13:38
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    Bought it long ago, it's a non-Apple brand: VTIN – Hamfry Oct 13 at 12:58
  • Thank you, it may help someone troubleshoot your issue. – jaume Oct 13 at 13:04
  • The dupe references a 4K display while this one HD. The issue is the same, however - you should get an active adapter as it produces a true HDMI signal. Your monitor, however, has DisplayPort inputs. I would get a USB-C to DisplayPort cable instead - it's less expensive (no adapter necessary) and more reliable (no converting of signals) – Allan Oct 13 at 13:42

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