Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

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SSD + RAM install - only beeps

Hello-

I have a brand new 2.8GHz 21.5" iMac that I turned on once and did a software update with. I turned it off, followed the guide on here and installed a 256GB Samsung 830 SSD. I believe I did each step completely with no surprises. The final step before turning the machine on was to swap out the OEM 8GB RAM with (also brand new) 2x 8GB Crucial DDR3L 1333.

When I push the power button I hear the HDD spin inside for ~1/2s. About 3 seconds in I hear a single beep that just repeats every ~5 seconds. If I let this continue for 5 or so beeps, the fan turns on full throttle and stay that way. Unplugging the computer and trying this again a few minutes now have the machine turning on with the fans already on full speed.

This leads me to believe it's the RAM - I tried both slots (one on top left, one on top right... one on bottom left, one on bottom right). No luck.

I tried the original 8GB of RAM. Also no luck. Again, tried both top and bottom.

Any advice would be greatly appreciated... perhaps I missed a connector?

Answered! View the answer I have this problem too

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Sheesh, I feel stupid.

Problem solved - I plugged the LCD thermal sensor into the wrong receptacle. It didn't even fit! Goes to show how these types of things benefit from a good light source :-P

Whew, glad that got worked out quickly

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Hello sebstewart, Please change your comment to an answer and accept it so this question may be archived to help future users. Thanks.

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The issue is RAM, see here.

It seems (I dont know your exact model) that 4gig sims max per slot is the limit, from here.

"For the iMac (Mid 2010) and iMac (Mid 2011) models, use 2 GB or 4 GB RAM SO-DIMMs of 1333 MHz DDR3 SDRAM in each slot."

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sebstewart will be eternally grateful.
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