iMac 2015 logic board upgradable to 2017?

Phil115

macrumors newbie
Original poster
Oct 7, 2019
3
0
Germany
Hi, I have an iMac retina 2015 27" M395X with a defective logic board, but the screen works perfect.
As I have seen on ifixit and with comparing photos of the boards of the 2015 and 2017 imac retina versions they seem really the same.

So now I am wondering if it is possible to upgrade my 2015 imac with a 2017 (maybe R570) board?
Are the displays the same so the old panel will work with the new board?
Maybe an issue could be a different power supply so I have to change this as well beside the CPU/Memory which needs to be upgraded.

Does anyone have experience or deeper knowledge of this?
 

TwoH

macrumors member
May 19, 2019
57
8
The only difference between the 2015 and 2017 that I can think of is that the 2017 has moved the location of the internal microphone - this could also mean that a couple of the pins on the camera connector could be in different places for these two years.
PSU should be the same with these models -- the only issues you would have is the internal microphone, and possibly your camera.
 

Zandros

macrumors regular
Sep 1, 2010
109
58
I believe the 2017 has USB-C/Thunderbolt 3 ports while the 2015 has Mini DisplayPort/Thunderbolt 2. Could perhaps be an issue with the holes for the ports?
 

Phil115

macrumors newbie
Original poster
Oct 7, 2019
3
0
Germany
Yes the 2017 IMac has got tb3. This is one of the reasons why I want to upgrade. But I think with a dremel this problem can easily be solved. Not beautiful but suitable.
The the camera and mic would be more an issue. I dont really need them, though I think the apple Hardware test would fail if I dont plug them in? Is the problem with the fans on maximum speed still existent if they are not plugged in? On the other hand, regarding the ifixit guide, I could easily change them too.
 

Fishrrman

macrumors P6
Feb 20, 2009
17,189
5,540
They're not interchangeable.

If you want "more", time to look for a 2017 or a 2019, new or Apple-refurbished.
 

Aiwi

macrumors member
Oct 21, 2010
35
23
As far as I know, the display connector is located in a different place, the camera connector and microphone as well. Since the display is using eDP, I guess it should be possible to make it work. Not at all sure about the backlight pin out though, watch out and measure voltages. Tb3 port arrangement will lead to a dremel situation.

Perhaps it’s better to buy a full 27” 2017 for 1000USD instead of a 2017 logic board for 500USD, unfortunately
 

mmomega

macrumors 68040
Dec 30, 2009
3,209
1,406
DFW, TX
check ebay for a dead or gutted 2017 imac.

You just need the case.

I would check ifixit to see if the monitor connections are the same, that would definitely be a deal breaker.

Just open a tear-down of both machines up side by side and see what is the same and what is different.