QUOTE(wildwild @ Feb 24 2011, 06:18 AM)
Most of the time it's the laser but sometimes it's the board or tray
Replace the laser first.
Good luck.
This.
It sounds like your Laser is dead. At least the Blu Ray portion.
The order of checking that the PS3 uses for sensing a disc is: Blu ray>DVD/CD>IR.
If the Blu Ray laser diode is shot, the system will not check CD/DVD, or IR. In most cases, replacing the laser unit fixes the issue. If replacing the laser does not fix your problem, then it could be a BD ROM Driver IC gone bad, as I noted in a post in this thread:
http://forums.xbox-s...howtopic=728044