The title says it all
There are a few ways to make the console lock up and crash with Modern Warfare 2 I will go over the major one and Hope someone can do something with it. In the 3.10 firmware I believe I read somewhere that if the console crashes its should give you the option to send the info to sony about the crash, this does not happen when they system crashes with Modern Warfare 2.
The crash will happen on Firmware 3.x That I have seen it on and any version of MW2 Release or Patched. The easiest way to get the system to lock up and crash you will need a friend to send you a invite to game request:
1) You have to be at the XMB (Not In Game!)
2) Have your friend in the multiplayer lobby
3) Have your friend send you a invite to game request
4) While you are at the XMB (Not In Game) accept the game request
At this point the game will attempt to load sometimes it will sometimes it wont. Either way the console will lock up crash and reboot. The lock up can take anywhere up to 1-5 mins its just random on how long it takes for it to crash. If the game decides to load it will move through the screens quickly to try to join your friends lobby and will crash they system and reboot.
Either way the outcome is the same total system failure.
you must do this pretty fast.
1) Load game
2) Select Multiplayer (Quickly)
3) Select Find Game (Quickly)
System Lockup and Reboot. For this method you have to spam the X button really fast so the console chokes when trying to find a game.
I believe these crashes are due to the new IWNET system in MW2
Have fun with it if you can figure anything good that can come of this