The discs are physically the same size, so I'm unsure as to why it would not accept a blu-ray, but would accept a PS1 game.
When you say you used alcohol to clean, do you mean the lens? If so, what concentration? And did you wipe the alcohol off of the lens instead of just letting it evaporate?
Generally speaking, if a disc drive won't read discs, you clean the lens and if it still doesn't work, replace the laser assembly/drive.