How to Disassemble the PS3 (Open it up)
..........Click Here
How to Clean out the Dust inside your PS3
..........Click Here
Please click on the Link below the Video to get the most out of this tutorial.
How to Change your PS3 HDD
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How to Reset Your SIXAXIS / DS3
If ever your SIXAXIS or DualShock 3 Controler stops responding...

With a pin or paperclip, press down on the Reset Button (Location located above)
to cut the power to the controler.
[*I've only had to do this once*]
PS3 Wont Read DVDs or Blu-Rays
Contact Sony Tech Support at 1-800-345-SONY (7669)
If the power indicator on the PLAYSTATIONR3 is flashing red and green alternately...
The interior of the system has become unusually hot. Check whether the system is being used in a hot location or whether the vents are blocked.
Stop using the system and leave it unused until it cools down.
Continuing to use the system in the above condition will cause it to stop functioning.
If the power indicator is flashing red and the system does not operate...
The temperature inside the system has risen too high. Check whether the system is being used in a hot location or whether the vents are blocked.
Touch the system's power button to stop the flashing, and then leave the system unused until it cools down. After it cools down, turn on the system again.
And if this dont work...
..........Click Here
It will cost you around 150.00 to get sony to take care of it...
Contact Sony Tech Support at 1-800-345-SONY (7669)