My TV (LG 42LC7D) has two HDMI ports. The first one is labeled HDMI/DVI (port 1) and the other is labeled HDMI (port 2).

I plugged the DVD player into port 1, put in a movie and expected it to come up. I hear audio (DVD player directly to receiver) but no video. The TV shows "invalid format". I'm thinking, strange.

I unplug it from port 1 and go to port 2. It shows up fine, no "invalid format" message.

Any ideas why port 1 would say "invalid format" and port 2 is fine?

<ul><li><a href="http://www.cable360.net/ct/operations/bestpractices/23213.html">HDMI</a></li></ul>

From the article posted by Kqw

"Sidebar 3: Troubleshooting HDMI

The latest versions of HDMI are more stable than their predecessors, but they're not yet trouble-free. Most of the HDMI problems stem from HDCP issues. The simplest fix is to encourage the sub to use analog component connections (YPbPr) until the issue has been resolved. Otherwise:
* Swap the existing cable with a known-good test cable if possible.
* Remove any HDMI switch boxes or repeaters and try again.
* Restart the TV, then power-cycle the set-top box in this order to force a new HDCP query from the box to the set. Sometimes the hotplug detect scheme doesn't work properly, and this procedure helps to identify this situation.
* As a last resort, flip the cable around. I've had one case where a cable exhibited a defect that caused it to be "directional." Apparently one end of the cable was exhibiting excessive crosstalk and only worked when it was plugged into the end that had a more forgiving chipset inside the device!

Warning: An older or poorly made HDMI cable might not work correctly on HDMI 1.3 because of the increased clock and throughput speed. Look for "HDMI 2.0 1080p capable" cables to insure compatibility with the newer specs."

it works with port 2. The cable itself is good otherwise I wouldn't be able to watch DVDs. I'll have to try power cycling next.