Filipe, you’re a genius!
My EON arrived yesterday and I was struggling with the HDMI not working properly. When turning on the RPI the video output was displayed but only for a few seconds and then ended in no signal. And I was sure the ports, cable and screen were OK as I’ve been using an ONE v2 case until now.
So I decided to give it a try for a search and found this topic and your answer. So today I spent some time tinkering with the multimeter found a short circuit between one of the pins and ground. Then I realized that a close inspection would have revealed the issue:
So with a soldering iron and courage, I was able to fix it. Nonetheless to find something like this with a QC Passed label is a bit frustrating and a real pity, as the EON case is an amazing product.