I've got a macbook with the following spec:
CPU: Intel Core2Duo 2.2 GHZ
RAM: 2X512 MB PC2-5300 DDR2
HDD: 160 GB
MacBook (13-inch, Late 2007)
Currently has 1GB of RAM in a 2x512MB config. I've bought 4GB (2x2GB PC2-5300 DDR2 667MHZ) and was hoping to upgrade it to it's maximum of 4GB, but whenever I install both dimms the machine won't power up, I just get a black screen (but the sleep light comes on).
It powers up if I just use 1 of the sticks or 1 of the 2gb sticks + a 512MB or 1GB stick and successfully boots showing either 2.5GB or 3GB respectively, but it just won't work with the 4GBs.
I've updated to 10.6.3 and am running EFI v1.4.
Does anyone know a way around this problem, I've tried google but not had much luck, any help will be greatly appreciated and REP will be given.
Thanks in advance!