Are you able to troubleshoot with help of a chart where the issue is?

Yes you can test each step and follow the analysis and determine the root cause.

Are you able to swap cables?

Are you able to unplug the connectors and plug them into the Gerbil controller?

Do you have tech savvy friends that can help?

Do you have a smart niece or friend that can help you figure out issues e.g. software, hardware, troubleshooting when it does want to do what it supposed to do and you're lost...