Slim PS2 version 12 will not turn on?
 

Hi, I've got a Slim PS2 version 12. It will not turn on anymore, the Red LED on the power button is not lit when the power cable is plug in. What could be wrong with it? What is the troubleshooting procedures for this?
So far I've check the Power cable/adapter, and all the fuses on the motherboard no problem.
Where do I go from here before I have to ditch this Slim PS2 motherboard? Thanks.

Any mods installed?