It means your flash card flunked the power up security check. Either the programming has been corrupted or the flash card is bad. The only way to know for sure which it is it to have someone reflash it for you. You also may be able to get rid of it with a game king developers boot chip and turning off the DSA/SHA security checks. That doesn't fix the problem, just masks it. If it's bad in an area of the flash not used by the game program then it won't cause any problems. If it has altered any of the game code then strange things may happen.