I tried to upgrade the hard drive on my 2.0Ghz Core Duo MacBook Pro and something went wrong. Here's what I did: Used SuperDuper! to make a bootable copy of my system onto a Western Digital 160GB Passport external drive. Opened up the MBP and removed its factory-installed Fujitsu 80GB drive, using the instructions at ExtremeTech. Popped open the Passport's plastic case and removed the WD Scorpio drive inside. Moved the MBP mounting hardware from the Fujitsu to the WD, attached the SATA cable, and put the WD into place. Closed everything up, put the battery back in, and powered up. But the MBP didn't go BONNNGG at startup like it's supposed to do. Instead, I could hear something whir (a fan?) and the little white LED on the latch-release button started blinking quickly... but that was it. Nothing else happened. The only iffy thing that came to my mind was that I saw that the WD had a jumper on its pins 1-2. I looked at the MBP's Fujitsu and it didn't even have pins to place a jumper on -- so I wasn't sure what to do. First, I removed the jumper and installed the WD without it. Then, after the MBP didn't power up properly, I took everything apart, put the jumper back on, and put it all back together again, but the MBP still didn't power up so I am not sure if that made any difference. That's all I was able to get done last night. The next thing I plan to do is put the original Fujitsu back in and try to restore the MBP to its original condition and verify that nothing is actually damaged. Also, I didn't check the SuperDuper! copy on the WD; I plan to put it back into its external case and try booting from it as an external drive. What does the blinking white LED indicate, anyway? And what might I have done wrong? Any ideas? Help!