Bad RAM Slot in my iMac ? :( - ehMac.ca
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Old Feb 25th, 2008, 12:32 PM   #1
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Bad RAM Slot in my iMac ? :(

Hi all,

When I use SLOT 1 on my 1st gen Intel iMac 20", my computer randomly reboots after running a few programs. Very highly annoying.

I've run MEMTEST with some interesting results that don't totally make sense but here they are:
This test is done in Single User Mode, OS X 10.5.2 with PC5300 DDR2 667MHz OWC RAM.

Each Slot test is run individually-none of these tests are run with both sticks installed.

First Test Run for RAM stick A:
SLOT 0=Pass
SLOT 1=Fail but did not reboot on its own

Second Test Run for RAM stick A:
SLOT 0=Pass
SLOT 1=Pass

First Test Run for RAM stick B:
SLOT 0=Pass
SLOT 1=Fail with self-Reboot (computer restarted on its own)

Second Test Run for RAM stick B:
SLOT 0=Pass
SLOT 1=Fail with self-Reboot (computer restarted on its own)

It seems that with RAM A it doesn't reboot by itself in SLOT 1 but it will reboot if RAM B is in SLOT 0.
All signs point that SLOT 1 is faulty.

This computer doesn't have Apple Care.

Last edited by Another_Paul; Feb 25th, 2008 at 02:38 PM.
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Old Feb 25th, 2008, 01:54 PM   #2
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While not common bad RAM slots can occur.

Test is this: Run Stick A in suspected bad slot with "good" slot empty.
Repeat with stick B
Then: Run stick A in good slot with "bad" slot empty
Repeat with stick B

If computer runs perfectly with either stick in one slot but has issues with either stick in the other you have confirmed and isolated the bad slot.

If computer runs perfectly with one stick in either slot, and fails with the other stick. The issue is a bad RAM chip. Again you have isolated which chip.
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Old Feb 25th, 2008, 02:41 PM   #3
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Quote:
Originally Posted by eMacMan View Post
While not common bad RAM slots can occur.

Test is this: Run Stick A in suspected bad slot with "good" slot empty.
Repeat with stick B
Then: Run stick A in good slot with "bad" slot empty
Repeat with stick B

If computer runs perfectly with either stick in one slot but has issues with either stick in the other you have confirmed and isolated the bad slot.

If computer runs perfectly with one stick in either slot, and fails with the other stick. The issue is a bad RAM chip. Again you have isolated which chip.
Sorry, I should have been more clear...Each Slot test is run individually-none of these tests are run with both sticks installed. So it looks like I have a bad Slot 1

Has anybody got a 2GB stick to work in my 1st gen Intel iMac before? That looks like my only option to get maximum RAM for my iMac now.
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Old Feb 25th, 2008, 09:47 PM   #4
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Since you have a bad slot 1, does that mean its under warranty and you can get it fixed by Apple?
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Old Feb 26th, 2008, 11:40 AM   #5
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Quote:
Originally Posted by FlaminWiz View Post
Since you have a bad slot 1, does that mean its under warranty and you can get it fixed by Apple?
Since it never had Apple Care the warranty now is looooong gone
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Old Feb 26th, 2008, 03:22 PM   #6
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Its over the 90days or 1 yr of free warranty?
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Old Feb 26th, 2008, 03:52 PM   #7
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Quote:
Originally Posted by FlaminWiz View Post
Its over the 90days or 1 yr of free warranty?
It's over the 1 year. This machine is probably about 2 years old now.
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Old Feb 26th, 2008, 09:14 PM   #8
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But if it was still under warranty, could you still get it repaired?
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Old Feb 27th, 2008, 09:14 AM   #9
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Quote:
Originally Posted by FlaminWiz View Post
But if it was still under warranty, could you still get it repaired?
If it was under warranty, yes, but it's not under warranty.
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Old Feb 27th, 2008, 12:22 PM   #10
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Quote:
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But if it was still under warranty, could you still get it repaired?
If it was under warranty, I would have had Apple fix/replace the logic board.
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