So last week, I upgraded my mac to a macbook pro (last generation, not the new ones currently out).
I decided to upgrade from my stock 2 GB of Ram to 4GB or Ram. I bought the following ram:
2 GB Kingston Ram DDR2 Ram : KVR800D2S5/2G , 2GB PC2 - 6400 CLF 200 - Pin SODIMM.
According to the local apple reseller, i had to guy this ram because my macbook pro has a 800 mhz system bus. I was initially going to buy the following Kingston Ram from futureshop because it was $40 versus $65.00 I paid for this ram.
Future Shop: Computer Add-Ons: Computer Memory: Kingston 2GB 200-Pin PC2-5300 DDR2 SODIMM Notebook Memory
The guy tells me that if I bought the FS Ram, that it will overheat and may affect the logic board and to just
get this $65 Ram specifically for 800 Mhz system bus.
I have a 2.4Ghz (penryn Processor) which does support 4 GB of Ram.
I get home, installed both Kingston Ram and the macbook pro would boot up, the light on the front indicates there is power but my screen is blank.
So I assumed i didn't seat the Ram properly, I took them all out , re-seated them again in the Ram slot. Boot it up, again only the light appears, it does boot up by my screen is blank.
So I assumed that one of the Ram is bad, I take out one of the 2GB Kingston Ram, started up the macbook pro, and there was not problems, it read 2 GB of Ram on the "about this mac"
So I take out that ram, replace it with the other 2GB Kingston Ram, started up the macbook pro, and there were no problems, it read 2 GB or Ram on this "about this mac"
So inserted both both 2GB or Ram into the macbook pro, power it up and again, the power light is on, i can hear it boot up, but then it's a blank screen.
Frustrated, i just put 1 GB of stock Ram and the 2GB Kingston Ram for a total of 3 GB.
I looked online on various forums, including the apple support for this issue. From what I have read, this symptom indicates that either one of the Ram is damaged or one of the memory slot is damaged. However, this is just not true as proven by my troubleshooting.