Memory Dimm1 Red LED

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Memory Dimm1 Red LED

hi, i have a mac pro quad 2009, today i found out that the RED LED lights on dimm slot 1 on the processor tray. and sys. profiler shows that the slot is not populated as 3 x 1GB of the ram is apple shipped stock ram. and i tried to swap the ram at the 1st slot to one another it still remain the same problem. What else i can do other than send to Apple service center?

Mac pro 2009 2.66Ghz Quad. 3GB RAM, Mac OS X (10.5.7)

Posted on Jun 22, 2009 2:30 AM

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Answer 1

Jun 23, 2009 11:39 AM in response to Vailance

There is another post on these forums about a red LED. The answer was that it indicated an improperly seated module. A vacant slot should not give such a warning (proviso). As delivered my device had several unpopulated slots. The problem you have may be that slot 1 specifically has no RAM. I suggest you buy another 1GB of RAM and install a total of four modules. put them in slots A1 and A2, and in B1 and B2.
As long as all the modules are of the same technical specification and that is the correct spec for your machine, then they should work.
Best advice is to use two pairs of same make but different makers will work provided they are same spec etc. If you have different makes put same makes together in any pair.
The other thing to be sure of is the seating per se. That seems to be a slot A1(?) issue in your case so you could test it by switching known good modules between the slots to test the slots. Remember to get the thing to work you should have a functioning configuration of modules.

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