If you have a Sony PlayStation 2 and you have the error “an error has occurred c1-6775-5,” you may have one of three common causes. Either your PSN code is invalid or you’re running out of firmware. Either way, there are solutions available for both. If you’re looking to solve the problem, you should try to update or restore your firmware. This will help you fix the problem as quickly as possible.
How to Fix the Error “an Error Has Occurred C1-6775-5” on a Sony PlayStation 2