Back in March of 2009 I bought a Crucial 4GB DDR2 PC2-5300 RAM kit for my iMac. All was working well until this past weekend when it would not boot up. I got the 3 beeps telling me no RAM banks were good. I replaced the OEM RAM and it booted fine. How do I go about replacing this 4GB RAM kit under warranty?
Sorry to hear you are having problems with your memory. Based on the testing you've done I recommend that you have the parts exchanged, and our Customer Support department can take care of that for you. Be sure to use the proper link for your location, and reference this thread so they can see the troubleshooting you have done.