Last november my ps3 bluray drive stopped working. Prior to that, the blue light would appear only sometimes when there was a disc in. Eventually it got worse to where I had to restart 4-5 times until the blue light appeared. Finally, it stopped working completely and the drive does nothing. Can't insert/eject/read discs. It also cannot play games from PSN. Could it be an issue with the logic board? How can I diagnose what the issue is?