Dv9000 Adapter plug glows but laptop won't turn on - after I replaced motherboar​d

So I tried installing a replacement motherboard myself on my dv9700. Apparently I'm not the only one with this problem. Anyhoo, I got the old one out after much stress and got the new one hooked up to the power and connected all the cables and tried to get a BIOS boot. The lights, fan, and optical drive all came on for a second, then shut off, then came back on but no BIOS, so I manually shut it off after a half minute or so. Then I thought getting the OS drive connected might do the trick. No such luck - in fact now the computer won't power. I tried putting the old motherboard back - same luck. My IT friend came over and noted (and I know this sounds idiotic on my part) that I hadn't swapped the CPU and the heat sink onto the new motherboard. We moved them onto the new motherboard but still no joy. The adapter glows at the connection but obviously the power is not flowing to the rest of the laptop. I know I'm a bit hardheaded to try to attempt this myself but what's done is done. I'm wondering if any of you kind non-flaming souls could tell me what the problem might be. My IT buddy thinks that there might be a short somewhere but that he downplayed my worst fears that I fried the new motherboard since the computer was only on for seconds at a time. 
Please help if you can with any ideas of what the cause might be - I'm probably taking it to another repair shop in a day or two but I'd like to be armed with some ideas. Thanks! 
Message Edited by Cigarovich on 08-18-2009 12:46 AM

No flames but it is not looking good. I have done dv6000 and dv9000 motherboards and I rank them as about the hardest laptop repairs I have done. Not for the newbie. Trying to power on a board with no CPU and fan in place should not have fried it in and of itself but the fact that you did that makes me question the entire technique you used. One screw in the wrong place or one touch at the wrong time CAN fry it.

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