Game disk was removed - ERROR

Okay, are you using the original PS2? If you are then it more then likely is the age of the console. The original PS2 console actually can't play some of the games that were made after the PS2 slim was released. If your using the slim than the only thing i can advise is to try using a laser lens cleaner disc and see if that helps :)

please make sure that the disk is readable
please look for the recognized formats in the manual

Im going to assume the disk isnt dirty or damaged? It could be the lens, very common problem that the PS2 had. There are plenty of guides (video ones on websites like Youtube) that show you how to clean/fix it.

same problem here. keep trying to reset it, it should come around soon.

get ur ps2 modded then u can play pirated/burned games.

You're stuck not being able to play, you need to get the slim PS2's because they reconverted the discs for a new disc encoding.

This may be because DVD movies have a reigion code on the disk and on a pirated disk this code may be removed. When the ps2 fails to find the code, it aborts playing the disk. I believe the regional lockout for games (which i assume you have disabled) is a different system to DVD lockouts.

You may want to replace the laser

hello .this could be a laser problem .most of the blue discs are cd based .silver can be cd or dvd . do you know how to pull it apart .also what version is it .the waqy to tell is by model no,and the amount of screws in bottom case.8 or 10

Is this a new problem or has your PS2 always had this issue? You cannot adjust the laser at all and are likely to damage it if you try, you can however clean the laser lens with a CD/DVD cleaning disk and you'd be surprised how often this resolves disk read issues. Some of these units did have a production fault that prevented them from reading DVD's, if your PS2 has had this fault since new and/or is under 12 months old you could probably have had it repaired/replaced by Sony but by opening it you will have invalidated you're warranty.