Also marginally related here, the stock specs for the CDX are 9.5V and 1.5 Amp. You've got enough amperage in your new supply, but you're missing half a volt. This can be an issue with those systems, but the lack of BIOS screen indicates your problem is probably somewhere else.

I just wanted to let you know this since I've heard using an underpowered power supply can kill the laser in these systems.