Member Avatar for peter_budo

I bought Iiyama XB2783HSU-B1DP monitor. However I'm not able to connect my MacBook Pro 2015 from HDMI with DisplayPort to HDMI cable. From monitor menu I am able to select DisplayPort, but monitor will fail to receive any signal from laptop. I tried to connect monitor with Asus laptop, DisplayPort no signal again, while connection through VGA port works fine. Any advice?

Edited by peter_budo because: typos
  • 2 Contributors
  • 3 Replies
  • 439 Views
  • 19 Hours Discussion Span
  • Latest Post Latest Post by rproffitt

Dani AI

Generated

Short version for (and to echo ): the cable you tried is almost certainly a passive DisplayPort→HDMI-style cable and is directional. Passive DP→HDMI cables expect a DisplayPort source that can output HDMI/DVI signals (DP++); they do not convert an HDMI output into a DisplayPort signal, so HDMI-out → monitor‑DP-in will show no picture. VESA documentation on Dual‑Mode (DP++) and Plugable’s adapter notes explain this behavior. (vesa.org)

The XB2783HSU-B1DP does not provide an HDMI input (it has DVI‑D, DisplayPort and VGA), so feeding it from the Mac’s HDMI port via a passive DP/HDMI cable won’t work — the monitor needs a native DisplayPort signal on its DP jack. The 2015 MacBook Pro’s Thunderbolt 2 ports provide a native Mini‑DisplayPort output, so the Thunderbolt2/Mini‑DP → DisplayPort cable you ordered is the correct and simplest fix. See the monitor specs and the MacBook Pro technical specs for the port details. Iiyama manual (specs) · MacBook Pro specs (Apple). (manua.ls)

If using the laptop’s HDMI output is required instead, an active HDMI→DisplayPort converter (USB‑powered) is needed — passive cables won’t do the conversion. Active converters exist but cost more and can be fiddly (power, compatibility, firmware). For reliability the Mini‑DP/Thunderbolt2→DP cable (or an Apple‑quality adapter) is the easiest route. Plugable explanation of active vs passive adapters. (plugable.com)

Quick checklist to apply immediately:

  • Confirm monitor Input = DisplayPort in OSD.
  • Fit the Mini‑DP/Thunderbolt2 → DisplayPort cable, power‑cycle both devices, run macOS “Detect Displays.”
  • If still nothing, test laptop HDMI on a TV (verifies HDMI out) and test monitor DP with another DP source (isolates cable vs port).
  • If HDMI→DP is mandatory, buy a known active HDMI→DP adapter (expect USB power). (dell.com)

Summary: was right that “not all cables work”; your Thunderbolt2 → DisplayPort cable is the correct, low‑cost fix.

Recommended Answers

All 3 Replies

Member Avatar for peter_budo

I ordered Thunderbolt 2 to DisplayPort cable now. Will see if that works. Nevertheless rather weird that HDMI from Asus laptop did not worked either...

Member Avatar for rproffitt

Peter, now I'm confused.

You wrote you tried some displayport to HDMI on both laptops. Now you are going to get some thunderbolt to displayport and guessing here you are going to use that cable that didn't work on 2 laptops? The outlook is not good from here. I don't expect that to work either.

I tried to not be blunt but here goes. Many "cables" don't work. It's why I just get the Apple adapter.

If there is some HDMI issue I test that with some BluRay player or other HDMI source.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.