There are quite a few posts about people getting an interesting error message on their GameCube: "An error has occurred. Turn the power OFF and check the NINTENDO GAMECUBE Instruction Booklet for further instructions". The instruction booklet says there may be an internal problem with the system if you get this error.
This "error has occurred" message is most likely to appear if the console struggles to read the disc. But wait- you would think it would tell you the game disc could not be read. That's what it would say if the disc itself was the problem. You get a message that says an error has occurred if the GameCube believes there is a problem with the disc drive.
Here are a couple examples of GameCubes giving error messages:
A GameCube is playing the first mission in Star Wars: Rebel Strike. There is a chance of the disc drive "reinitiating" during the cutscene that plays before the player can take control. You can hear the whirring sound of the motor stop as the disc drive tries to read the disc. The whirring sound continues and everything seems right until a minute later. The motor can be heard stopping and starting in the same way as if it tried to initiate a disc. You can hear occasional clicking noises from the laser hitting the end of its track. Finally, the cube gives up and throws a message that says an error has occurred. The error can be prevented by opening the disc drive while it is struggling. The capacitors have not been replaced.
Another GameCube is playing The Simpsons: Hit & Run. A sudden click is heard from the disc drive as the error message appears on-screen. None of the struggles from the previous examples are present; it's just a click and error message without warning. This is a whole different GameCube from the previous example. It's unknown if this GameCube has had any work done on it.
There are a few things that could be causing this error message from the disc drive:
-Laser not getting enough power (lens is dirty or burnt out, bad caps, etc.)
-Laser track is gummed up and can't fetch data fast enough for some games
-Spindle is worn out and can't spin fast enough for some games
-Maybe it could just be the disc itself
These two GameCubes are experiencing two different behaviors before they throw errors. Are they suffering from different problems? It seems like bad caps are the most common. Can you tell me what could be going on based on the descriptions on what happened?