Use iMac 27" (Late 2012) 2546 internals in a PC case

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iMac Intel 27" EMC 2546 修理指南

型号：A1419／ 2012／2.9 & 3.2 GHz Core i5 or 3.4 GHz Core i7 专业版

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goldenbear @goldenbear

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发帖于: 2020年2月21日

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Use iMac 27" (Late 2012) 2546 internals in a PC case

Hi,

I have a iMac 27” (Late 2012) model, but screen cracked. Don’t want to invest in the whole LCD unit replacement which can’t be reused down the road. So I want take the internals out and put it in a separate PC case, and connect it to a separate monitor.

I went online and did some research and found that, this might be possible, but the main issue is the LCD thermal sensor. I need to find a way to either disable it or trick it into thinking that the LCD thermal is ok. Otherwise, the system would put the fan to max speed and throttle the CPU severely to prevent overheating. Is there any suggestion to crack this issue?

Thanks

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@goldenbear let's see if we can help you. The sensor is really nothing more than a transistor that measure this. We would need your board to see if it can be bypassed

For further reference on this question 2n3904, 2n4401

由 oldturkey03 完成的 2020年2月22日

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@goldenbear let's see if we can help you. The sensor is really nothing more than a transistor that measure this. We would need your board to see if it can be bypassed

For further reference on this question 2n3904, 2n4401 — oldturkey03

oldturkey03 @oldturkey03 声誉积分: 782.2千 1.1千 893 2.3千 · Answer 1 · 2020-02-22T09:06:54-07:00

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oldturkey03 @oldturkey03

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@goldenbear you should be able to bypass the sensor by connecting/soldering the corresponding pins via a ~1K ohm resistor across the pins. That should “fool” your motherboard into believing that the temp is normal. You could most likely do this on your temp sensor cable. Post some good pictures of those parts so we can hopefully guide you further

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Dan @danj 声誉积分: 479.3千 Self employed contract worker 35 329 971 · Answer 2 · 2020-02-22T08:21:53-07:00

Dan @danj

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For the amount of effort and costs I would just cover the display with tape so it doesn’t break anymore and just plug in an external monitor.

Frankly, the cost of even the cheapest display would be cheaper than all the pieces needed to convert the system into a PC case and still have access to the ports.

As an example: Grade-C - 27” iMac Display Assembly (12/13) Apple P/N 661-7169, LG ID LM270WQ1 (SD)(F1) $315 USD

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