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<blockquote data-quote="Padawan" data-source="post: 40167" data-attributes="member: 273">I would first make sure that the firmware is correctly updated by performing the process again.&nbsp; The instructions and the download are at the link below:<a href="http://docs.info.apple.com/article.html?artnum=75130" target="_blank">http://docs.info.apple.com/article.html?artnum=75130</a>I would then use the OS X installer to completely zero the drive (not just format, but actually write the drive with all zeros).&nbsp; IMO, this is more of a &quot;clean-slate&quot; than simply formatting.&nbsp; Finally, go ahead and do a fresh installation of OS X.&nbsp; If you continue to experience problems after all of this, then I would also suspect the RAM, as witeshark mentioned.&nbsp; The only reason why I'm not convinced it's the RAM is that it sounds as if it ran fine under the old OS, and that installing OS X was the only thing that changed before the problems began.</blockquote>

[QUOTE="Padawan, post: 40167, member: 273"] I would first make sure that the firmware is correctly updated by performing the process again. The instructions and the download are at the link below: [url]http://docs.info.apple.com/article.html?artnum=75130[/url] I would then use the OS X installer to completely zero the drive (not just format, but actually write the drive with all zeros). IMO, this is more of a "clean-slate" than simply formatting. Finally, go ahead and do a fresh installation of OS X. If you continue to experience problems after all of this, then I would also suspect the RAM, as witeshark mentioned. The only reason why I'm not convinced it's the RAM is that it sounds as if it ran fine under the old OS, and that installing OS X was the only thing that changed before the problems began. [/QUOTE]

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