DVI to HDMI conversion through HDMI KVM doesn't work when connecting to an HDMI display

I am trying to use an HDMI 4 port KVM with a docking station that has vga, display port and DVI connectors.
The display I'm connecting to has vga, HDMI and Display ports.
I can connect directly to the display using the display port or vga cables, but connecting to the display through the KVM fails (no signal) while converting the DVI from the dock to the HDMI of the KVM. I'm using a DVI to HDMI converter  The KVM is connected to the display via HDMI.

I thought DVI and HDMI would work sans the audio. But there's no video delivered there.

Any ideas why this isn't working?

Thanks for any insight.
Mark LitinOwnerAsked:
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William FulksSystems Analyst & WebmasterCommented:
Are you sure your cable is DVI to HDMI and not the other way around? It should be DVI input and HDMI output. Does it work if you connect directly from the DVI output on the dock to the HDMI input on the TV?

Also, what kind of KVM are you using?
Mark LitinOwnerAuthor Commented:
Hi, and thanks.

I have a SeaWit HDMI 4 port KVM.

I have a Lenovo T520 with which I use the appropriate  Lenovo docking station  The video output I'm using from the docking station to the KVM is the DVI port.  It is connected to a DVI to HDMI adapter which connects to the KVM.

It does connect from the DVI->HDMI adapter from the dock to the display.  So I guess it's the KVM at fault?  I saw no other reports of this happening.
William FulksSystems Analyst & WebmasterCommented:
So weird that I can't even find a company website for SeaWit. I wonder who actually makes them? One site said it supports DVI to HDMI.

Have you tried using a different port on the KVM? It may be a bad port. The KVM is definitely the problem, but I can't really confirm if it's supposed to work with the converter.

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Mark LitinOwnerAuthor Commented:
Hi, and thanks.

I've done some research and found that the dock has a DP rather than DP++ port,  and what I'm probably missing is an active rather than passive adapter.  I expect to receive one in a few days and will attempt with that.

I'll report back on progress (or lack thereof)

William FulksSystems Analyst & WebmasterCommented:
Yes, please let us know how it works out. Good luck!
Mark LitinOwnerAuthor Commented:
Hi William

I have been around the ringer with getting this to work, including getting an active DP to HDMI converter.  All solutions work when directed between the laptop or doc to the display, but none work with directing it through the HDMI KVM and then to the display.  I am now convinced that the KVM itself is at fault and will try to get them to either provide the correct solution of refund my $.

Thanks for your support and insights.
William FulksSystems Analyst & WebmasterCommented:
Not a bad idea, considering I couldn't even find the manufacturer's website.
Mark LitinOwnerAuthor Commented:
William FulksSystems Analyst & WebmasterCommented:
Can you go ahead and close this question then?
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