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Ever since my upgrade to High Sierra my external Samsung monitor stopped working
It's connected via a Thuderbolt > DVI cable
It's been working fine ever since I got the new imac 2 years ago.
iMac 27" i7
AMD Radeon R9
...I did all the resets and recommended fixes
Reset the NVRAM, as per > How to reset NVRAM or PRAM on your Mac - Apple Support
If that does not help? Then I would try a different MiniDisplay Port/Thunderbolt to DVI cable or a MiniDisplay Port/Thunderbolt to DVI adapter and DVI cable.
FWIW I have several Samsung DVI monitors connected to different Mac's using Kanex MiniDisplay Port to DVI adapters and I've never had a single problem caused from updating macOS's.
Reset the NVRAM, as per > How to reset NVRAM or PRAM on your Mac - Apple Support
If that does not help? Then I would try a different MiniDisplay Port/Thunderbolt to DVI cable or a MiniDisplay Port/Thunderbolt to DVI adapter and DVI cable.
FWIW I have several Samsung DVI monitors connected to different Mac's using Kanex MiniDisplay Port to DVI adapters and I've never had a single problem caused from updating macOS's.
YES I got a new cable and it works now.
I'm pretty sure it was the thunderbolt > dvi adaptor... I bought a single 6' cable (no adaptor) for about $15 on Amazon and it works great. I never would have thought cable would go bad.
Thanks fellas.
T
Telling us you did "all resets" does not tell us what you did. Please be specific about which resets you have done. Also, consider changing the adapters and/or cables. They can and do go bad.
I will order a new cable and see if that works. thanks.
You're welcome!
imac external monitor stopped working
