i just got a ps1 game that i bought online and when i went to try it the console was acting like there was nothing in the drive, first thing i thought was that it might be a problem with the game so i dug out my old copy of ff7 that i had tried on the system before and its doing the same with that too 
its still playing ps3 games so i dont think its the drive

its still playing ps3 games so i dont think its the drive