Hey I purchased some RAM off of the forums recently and installed it today. My 12" 1.5 PB is not detecting it. I've done everything I could think of and it still says that there's only 256MB ram installed (upper). I looked under System Profiler and saw this under 'Diagnostics': Power On Self-Test: Last Run: 1/2/06 10:56 PM Result: Failed Failure type: Memory Memory slot: DIMM1/J31 Does this mean it's faulty ram? The guy I purchased from says he tested it and it worked fine so I'm not blaming him so what's the deal? I won't have time to go an Apple Store until the weekend so I'm hoping someone on here can help me out.