I decided to breathe some new life in to my 2007 2.2GHz MacBook by: -upgrading the RAM to 4gb w/Centon memoryPOWER 2GB DDR2-667 PC2-5300 CL5 SO-DIMM Laptop Memory Module -replace the HDD with a SSD (Samsung 840 Pro-Series MZ-7PD128BW 128GB SATA 6.0Gb/s 2.5" Internal Solid State Hard Drive). -Also going from Leopard to Snow Leopard after the hardware upgrade, then possibly Lion/Mountain Lion... What I've already done: 1. Backed up my hard drive using time machine, did not clone 2. Using the install disc/Disc Utility, I erased my old hard drive completely (Hope that wasn't a huge mistake!) 3. Replaced the previous 2gb (1x1gb) with the new 2x2gb RAM sticks 4. Swapped out the HDD with the SSD When I went to boot the machine, all I get is a black screen. I can hear the optical drive spin for a while, then stop. Screen remains completely black. I have tried using C while starting as well as Control - same result. So, I put the old (erased) HDD back in and again got the same result. I didn't have time to put the old RAM back in and try again before work this morning and intend to tonight. Based on that, maybe my RAM isn't compatible even though the specs look to be...? But, does anyone know if the components I am using are not compatible? or did I totally screw up by erasing the old Drive prior to confirming this would work? Am I missing something else? Any help would be MUCH appreciated!