Robert Neumann

In the Web UI, is there a developer option to disable the syncwatcher? If so, please try that, once the console shows a normal image.

Not really.. The message means that the GBS chip didn't respond on the I2C bus. It could be power related, signals conflicting (SDA/SCL swap or so), etc.

Okay, try to remove the clock gen SDA and SCL wires. If it then works, you know that the I2C bus is getting bad with the clock gen on it,...

"GBS board not responding!" means that the main ASIC is not responding (or responds with errors) on the I2C bus. It means that it is still not fixed. If it...

Can you please unsolder the 2 clock gen SDA/SCL wires and check what happens then?

So since it's still dead with the I2C wires for the clock gen removed, it means that when installing, you accidentally broke something else. Find that "else" next. You mention...

Hey, I'm sorry you had all these troubles, but GBSC the project is not commercial. Several groups have used the software to offer something more refined than a bare board,...

Hey, is it even possible to freely pick any pin for the I2C? You may find this in the ESP8266 documentation.

You have a different problem on each console :) Starting with the Mega Drive, a dark image is usually a sign of the RGB cable not being built to what...

They have been making the same base GBS since forever, and you can always buy one. You need to look for one that looks normal, and has black control buttons....