Laptop boots for 3 seconds before shutting down, black screen

Jan 16, 2015
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I want to switch out my T4300 on the ASUS P50IJ to the T9600.
I changed the CPU and I booted the laptop, the screen is black and it turns on for 3 seconds before shutting down. (With the T9600)
It works fine with the T4300, but not the T9600.

Any idea on whats going on?