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The PlayStation 3 (or commonly known as the PS3) is the third home computer entertainment system produced by Sony Computer Entertainment, and the successor to the PlayStation 2. It was released November 11, 2006

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Ps3 fat when I turn it on fan goes crazy then it shuts down

Hello there fellow fixers,

A friend of mine brought me an old ps3 fat for fixing.

When i push the power button it starts normally (menu and game loading) but after about a minute the fan goes crazy , the green light flashes red , i get a message saying “The system has become hot” , three beeps and it shuts down.

I opened it up, cleaned it and applied arctic silver 5 thermal paste. The issue persists.

I assume it’s not an YLOD issue since it boots up normally.

Thanks in advance.

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Should i reflow or not??

Any opinions??


Does the LED show yellow?


Just before the shutdown there is an instant flash of yellow.


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the fan is PWM controlled so that third wire, the grey one, is used to control the fan speed. The voltage for the brown wire should always be at 12v and Black is the ground. Check this site for more info. The issue here is that the fan controller gets input from various thermistors (not transistor but thermistor) to respond to increased temperatures at various locations. You could trace the circuits via the diagram and check the thermistors etc, or you could try to modify your fan via a separate fan controller. Here is a pretty good mod for that. Hope this helps, good luck.

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Of course you do want to make sure your PS3 is really not getting to hot. Also a reflow might work for a short while but it is definitely not permanent. Something like this would be what you are looking at.

Let us know what model this PS3 (even better is you know what motherboard it uses) is so we can look into further possibilities.

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Ps3 model is cechg04.

The mobo is a sem-001. Serial 1-875-384-21.


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I believe that the heat “sensor” in these is just a transistor that changes characteristics with heat. It is quite possible that this transistor is now damaged and providing false heat information to the system which reacts by shutting down. I no longer have the prints for this, so I can’t indicate the location of the sensor, but that would be my first target.


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antonis sarà eternamente grato.
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