Instructions
Insert a different disc into the PlayStation 2. If you receive the same error, your system's disc reader has failed and will more than likely need to be repaired by Sony. If the disc boots up properly, you will need to repair the previous disc that was giving the error.
Clean the disc by running warm water over it. Using only warm water, you can clean out any debris in a scratch that may prevent it from playing. Take care to gently dry off the disc completely, as putting a wet disc into the console can severely damage your console.
Repair the disc by taking it to a commercial store, such as Hastings or Blockbuster. Many game and movie rental stores also offer the service of repairing any scratched discs. This can provide both a short and long-term solution to your problem by repairing the disc back to its condition when you first opened its case.