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<blockquote data-quote="joehealey" data-source="post: 1682113" data-attributes="member: 333313">Yeah the issue was present before the upgrade (sorry, I thought I'd made that more clear). We assumed it would be dead RAM, and so bought the new set. I've tried reseating a couple of times (as that was also on the suspicion list for the old set of RAM), so I'm 99% certain it can't be that, and that we're facing a more sinister problem.I can't see any reason why RAM incompatibility would be an issue as the set was purchased via crucial using their RAM compatibility program. The problem seems to be somewhat intermittent too and the mac CAN boot successfully every so often, but will crash sometime thereafter (which also encourages me that we have the right RAM else I wouldn't expect a boot of any kind).I'll take a look at your link thanks, and for the sake of the thread, the beep pattern is 3 beeps in fairly quick succession, followed by a pause, then the 3 repeats. It does this on a gray screen.</blockquote>

[QUOTE="joehealey, post: 1682113, member: 333313"] Yeah the issue was present before the upgrade (sorry, I thought I'd made that more clear). We assumed it would be dead RAM, and so bought the new set. I've tried reseating a couple of times (as that was also on the suspicion list for the old set of RAM), so I'm 99% certain it can't be that, and that we're facing a more sinister problem. I can't see any reason why RAM incompatibility would be an issue as the set was purchased via crucial using their RAM compatibility program. The problem seems to be somewhat intermittent too and the mac CAN boot successfully every so often, but will crash sometime thereafter (which also encourages me that we have the right RAM else I wouldn't expect a boot of any kind). I'll take a look at your link thanks, and for the sake of the thread, the beep pattern is 3 beeps in fairly quick succession, followed by a pause, then the 3 repeats. It does this on a gray screen. [/QUOTE]

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