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Message: <blockquote data-quote="Janx" data-source="post: 5870345" data-attributes="member: 8835">My PS3 (orig 60GB model) has had the blue ray drive die.  i'm going to order a replacement online for about $70.  I'd already disassembled it and tried cleaning the drive.  Which, btw, the way that drive is built it stays REALLY clean, so a dirty bluray is one the least likely problems to have.A bad hard-drive is more likely to generate a read/write error that the OS would report.  It is highly unlikely that a storage device is going to cause a whole system shutdown.  Most operating systems talk to the drive through an API that would simply return an error code, to be passed up to an error message to the screen or a attempt a retry.  The drive does not sit in the critical path.Things that cause a shutdown:power supply failurethermal temp deadly is reached, which the OS monitors a thermal sensor, and when that temp is reached, issues a shutdown command. Temp Deadly is usually implemented as a direct and immediate power shut down.  Temp Caution is a lower threshold, and when this is reached, the operating system issues a graceful shutdown command.Almost any other kind of chip faiure is more likely to cause a freeze or graphical glitch than actual shutdown.  This is because the power supply controller has to recieve a shutdown command for it to remove power.  It is possible the Power supply controller has an extra signal from the processor to detect a "hang" but this would make it impossible to debug a crash or hang.  Development models of computers have debug ports so they can connect logic analyzers to the system and read the memory and control the processor so they can step through instructions to debug what caused the crash.  To mimize system change from the test to production model, these ports are removed, but the traces are still there on the circuit board.  To redesign the board at the last minute for the production model would invalidate the testing.Most of what I've described above applies to the PC world, but I expect certain commonalities with game consoles, as they are not really all that different.To sum up:you can try swapping the drive, I doubt it will helpyou can try making it cooler (to verify if its an overheat issue), maybe run it in a cool dry placeyou can replace the power supply chain, or at least detach and test it.  a voltmeter would tell you if the levels are consistent on the output end.</blockquote>

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