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モデル番号A1419 / Late 2012 / 2.9 & 3.2 GHz Core i5 or 3.4 GHz Core i7 プロセッサ

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1 Beep every 5 seconds!

I change the memory, the power supply, the Logic Board and the Processor and change the hard drive just in case, but still one beep every 5 seconds!!!! What can I do? The iMac does not boot, just turn on the fan... I tried SMC reset and other keyboard fixes but the keyboard looks like does not have power. :-(

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PCラップトップ用バッテリー

An easy fix for a big power boost.

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PCラップトップ用バッテリー

An easy fix for a big power boost.

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On the Apple site it tells that there's no RAM or it's not supported. It only supports 600 MHz PC3-12800 DDR3 SDRAM SO-DIMMs (204-pin). The RAM might also not be properly seated or the sockets are broken or the slot pattern isn't like it should be (the way the RAM is in the 4 sockets might not be in the right order) or one or more dimms are defective.

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I receive all that information and change all the memories. Also, I change the logic board and processor and the problem persist. A local Apple technician try to fix it too, but fail. Right now I have a new iMac. The one with the problem is in my office waiting for repair. :-( If there is a possibility that the problem is about software?

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Any updates friend? My mac is beeping one time also and now i'm afraid to repair it if is possible that the error persists

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Have you tested above things already?

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Also I got the same problem on imac 27” a1419. I would like to change power supply. Is it good idea or useless plan as like you got same experience?

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I took off the screen and found the led lights on mainboard. 1&2 is on and 3,4 is off. As I know, 3rd light means gpu got issue? If then how can I fix this issue? Replacement gpu or reheating or rework? Please advise. Thanks.

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Try disconnecting the Headphone Jack on the mainboard

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noelfoto さん、ありがとうございました!
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