Hey all, I've just been given a 15.4" MacBook Pro ICD 2.0Ghz/128MB VRAM/2GB Ram (1x1), and I decided to take a 2GB Ram module out of my 2007 MacBook IC2D 2.16Ghz/Intel GMA with the hope of bringing the MacBook Pro to 3GB. Now, they both use exactly the same Ram type, I checked first. 667Mhz, DDR2, SDRAM. Anyway, when the MBP has the 2GB installed, it wont start up at all. No backlight, doesn't want to do anything apart from spin the disk a little. I put the 2GB module back into the MacBook and it works fine, so I didn't kill it on transfer. What's going on? Will my MacBook Pro not allow a 2GB module? Thanks for the help guys, much appreciated.