I hope some specialists can give me some hints about how to track the issues.
I built 2 unit: one is working perfectly, while the other have some issues. There is a color issue that is visible on the test pattern, vertical lines have weird colour, odd one are purple, even are a bit yellow.
Also the compatibility with multiplication modes is limited with that unit compared to the other one. Ex: 480i passthrough not working with that unit. And it works with the other one on same TV. Same with 240pX3.
Do you know where should I look? I don’t see any visible solder bridge.
The color issue looks like you have a floating pin(s) on the color data bus between FPGA and HDMI TX (B perhaps). If some modes are not working on that specific board, it may be a sign of other weakly connected HDMI TX pins as well.