Why am I getting error HDMI connection doesn’t support DHCP, when the cable does?

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Level 1

8 points

Why am I getting error HDMI connection doesn’t support DHCP, when the cable does?

Using Apple TV 4K (model A1842, tvOS 12.1) with 2018 Samsung Q7 (model QN55Q7FNA, sfw vrs T-KTM2AKUC-1153.1, BT-S). Apple TV is connected To Samsung’s One box. attempted 5 different high speed HDMI, including the Belkin sold at Apple. Attempted multiple video format adjustment settings on both devices to no success. Took Apple TV to Genius Bar ready to have it replaced, but they could not reproduce the issue on the 4K TVs there. Irritating, but I saw it work as expected at the store. Brought back home. Spent over an hour with Samsung tech and issue was escalated within Samsung. The “workaround” of unplugging/plugging the Apple TV does not work for me. I’m hoping someone found the “magic” combination that works.

Posted on Nov 13, 2018 8:17 PM

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Answer 1

Mr.Goonies Author

Level 1

8 points

Nov 14, 2018 10:36 PM in response to Urquhart1244

Hi! I was able to perform the steps you recommended. Unfortunately it didn’t resolve it. However, I was able to resolve it with a new cable I had not tried before. Thanks for your help.

The cable is from audioquest, ocean model, 4K UHD, HDCP 2.2, HDR, Exceeds 18Gbps (only @ Best Buy)

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Answer 2

Mr.Goonies Author

Level 1

8 points

Nov 14, 2018 11:29 AM in response to Urquhart1244

Thank you so much for the quick response. I will try this tonight and update the response. In case it doesn’t work, is there any additional information I can provide that might help further?

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Answer 3

Urquhart1244

Level 10

146,770 points

Nov 14, 2018 10:33 PM in response to Mr.Goonies

HDMI has a ‘handshake’ protocol, where newly connected HDMI devices ‘talk’ to each other about their HDMI capabilities. What this means is, you may need to fully unplug and re-connect ALL HDMI devices in the chain. I.e. not only the Apple TV, but the TV, the One Box, and optionally HDMI audio equipment. For good measure, unplug the power as well as the HDMI cables, to ensure all equipment does the handshake thing once more.

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Why am I getting error HDMI connection doesn’t support DHCP, when the cable does?

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