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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac mysterious failure! (maybe RAM?)

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Member Since: Oct 04, 2011
Posts: 4
DeeJayo is on a distinguished road

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My iMac was working just fine a few days ago. When I got this computer it came with 1GB of ram and I very recently upgraded it to 2GB. I installed my programs on it (which need 2GB to be useful) and I then ran a software update. The software update was in progress for HOURS and wasn't making any progress at all. So I held the power button and shut it off. Next time I turned it on I didn't have the power chord all the way in, and the computer sounded like it had the fan running extremely high. So I thought silly of me, and restarted it again with the power chord fully in. It was all working just fine. I watched a few shows on the internet, and left the computer on until the next day. I come back and go to hit back in the browser and I got nothing but a spinning mouse wheel. About an hour and a half later with no progress, I shut it off. NOW THE COMPUTER DOESN'T SEE THE STARTUP DISK! It makes two beeps (one short and the next long). I tried to run DiskWarrior to rebuild the directory, but it does not see my computer's HD. I researched the two beeps and found they may mean incompatible ram.
So I had a way of checking the ram myself, I swapped it with 2GB of ram from my mac mini. My mac mini sees the iMac's ram, and the iMac has the mac mini's ram and still the same problem. I can't believe this. Haha sorry about the details but I thought I should explain anything that might have led up the problem. Does anybody know what's wrong?
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Mac Specs: Black MacBook 2.2GHz C2D, 4GB Ram - iMac G4 700MHz, 512MB Ram

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Where did you get your ram from, and are sure it's 100% compatible? Sometimes you can get flaky ram that will work for a week or so, but then fails soon after .
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Member Since: Dec 13, 2009
Posts: 166
Head_Unit will become famous soon enough
Mac Specs: iMAc 1.8GHz PowerPC G5, 2GB, 10.5.8

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What happens if you put the original RAM back in?

And, you need to fill out your profile so we can see which machine you have. They all have different diagnostics and behaviors.
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Member Since: Oct 04, 2011
Posts: 4
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I have four RAM chips that fit into this computer, none of which in any combination help get the computer started. Every RAM chip works in my mac mini. This is my Mac Mini... Mac mini "Core Duo" 1.66 Specs (Early/Late 2006, MA206LL/A*, Macmini1,1, A1176, 2108) @

And this is the iMac...
iMac "Core 2 Duo" 2.0 20-Inch (Al) Specs (Mid-2007, MA876LL, iMac7,1, A1224, 2133) @

The RAM that the iMac had was one of the 1GB original chips that comes with it.
I added 1GB PC5300 DDR2 667MHz 200 Pin SO-DIMM

The RAM that the Mac Mini came with was two 512MB 2Rx16 PC2-5300S-555-12-A3 chips
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