HDMI to DisplayPort 38146 - working intermittently

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drewm
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by drewm » Wed Jun 28, 2017 9:38 am
Hello

I'm using Part No. 38146 (HDMI to DisplayPort 4K adapter) to connect a Dell PC with HDMI output to a Dell monitor with mDP input. Occasionally it works perfectly, but most of the time I get no signal to the monitor at all.

Here's what I have:

[Dell PC HDMI] - [HDMI cable] - [HDMI power injector 41080] - [HDMI to DP 38146] - [DP to mDP cable] - [Dell monitor]

That looks more convoluted than it is! :-)

All the cables are new and work independently. I've tested the output from the PC with an HDMI TV, and the input to the monitor with a mDP cable from a MacBook Pro. Everything works fine when isolated - but together I've only seen it working twice.

For example, when it was working I was able to use the PC to run some Windows updates. After the update, the PC rebooted and I never got the signal back.

Any idea what's going on here?
LINDY John
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Joined: Mon Oct 03, 2011 9:46 am
by LINDY John » Wed Jun 28, 2017 10:28 am
The adapter would normally take power from the DP port not the HDMI. It may therefore, in spite of the injector being used, be a power issue.
drewm
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by drewm » Wed Jun 28, 2017 10:32 am
Ah! Interesting. Is there such a thing as a DP power injector?
LINDY John
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by LINDY John » Wed Jun 28, 2017 10:38 am
Not something I've ever seen
drewm
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Joined: Wed Jun 28, 2017 9:25 am
by drewm » Wed Jun 28, 2017 10:39 am
Would Part No. 38147 be a suitable alternative, do you think?
LINDY John
LINDY Staff
Posts: 189
Joined: Mon Oct 03, 2011 9:46 am
by LINDY John » Wed Jun 28, 2017 10:46 am
If the max resolution is OK then yes I would think that this is a better alternative. Power is on the HDMI side
6 posts Page 1 of 1