Late 2014 logic board replacement options?

[djrounds]

i have a beloved Late 2014 27" i7 (A1419) that needs a logic board. It had been on permanent loan to my daughter. She was using it daily and usually left it turned on. One day she found it dead. i suspected the power supply and replaced it with a used one but that didn't bring it to life. This machine has been upgraded to 32GB and a 2TB OWC SSD for many years. Can I safely replace the logic board with one from the 2014 or 2015 years. I assume if I try to go outside those years I could run into case issues or other compatibility problems. I have the serial number but unfortunately I can't find other identifing that might be required if I'm trying to find an exact logic board replacement. I'm willing to take a chance but it's so old I don't want to invest a lot of money in it. I curently have the case open so

Thanks for any help.

 

[TwoH]

Are you certain the board is dead? How many diagnostic LEDs do you get when pressing the power button?

Else if you are looking to replace the board - you should be okay to replace it with either another 2014, a mid 2015, or a late 2015. You shouldn't experience many (if any) issues.

 

[djrounds]

Are you certain the board is dead? How many diagnostic LEDs do you get when pressing the power button?

Else if you are looking to replace the board - you should be okay to replace it with either another 2014, a mid 2015, or a late 2015. You shouldn't experience many (if any) issues.

After replacing the power supply i get 1 diagnostic led. Unfortunately I didn't plug it in with the original PS I did short the power button connector and nothing. Thanks for the information about the replacement option. Even though it's a decade old it's too nice a machine to go in the dumpster even if it only ends up running Windows and Linux.

 

[redheeler]

If you’re technically-inclined enough I would suggest the DIY 5K display project. Great way to repurpose a 5K iMac with a bad logic board.

 

[djrounds]

Got a good deal on a late 2015 top end logic board. I think it will be as good as a machine from this era can be and should serve me well for a few more years. thanks for the advise

 

[specialstyle]

Got a good deal on a late 2015 top end logic board. I think it will be as good as a machine from this era can be and should serve me well for a few more years. thanks for the advise

Nice! If you run into any issues with the board and still need to find something you should check on eBay.... there are tons of these machines that are very very cheap. Good luck with the replacement!

 

[djrounds]

Are you certain the board is dead? How many diagnostic LEDs do you get when pressing the power button?

Else if you are looking to replace the board - you should be okay to replace it with either another 2014, a mid 2015, or a late 2015. You shouldn't experience many (if any) issues.

I have purchased from eBay what is purported to be a late 2015 i7 logic board that is supposedly guaranteed by the seller to work in my late 2014 IMac. My original board has the 128GB flash used with the 3 TB fusion drive which was replaced with the OWC SSD kit many years ago. The late 2015 logic board has the socket for the flash but no flash. I'm trying to decide whether to transfer the flash card to the newer logic board and thinking I won't. Any advice on this?

 

[specialstyle]

I have purchased from eBay what is purported to be a late 2015 i7 logic board that is supposedly guaranteed by the seller to work in my late 2014 IMac. My original board has the 128GB flash used with the 3 TB fusion drive which was replaced with the OWC SSD kit many years ago. The late 2015 logic board has the socket for the flash but no flash. I'm trying to decide whether to transfer the flash card to the newer logic board and thinking I won't. Any advice on this?

There is a compatibility tool i'm having trouble finding.... I want to say I saw it recently here on the forums, but it should more or less let you check if the drive is compatible with the logic board. If you're using the OWC though....you don't really need to use the flash chip as well -- although that would technically be a faster drive, it is likely too small and you'd need to upgrade it to be worthwhile.

 

[djrounds]

There is a compatibility tool i'm having trouble finding.... I want to say I saw it recently here on the forums, but it should more or less let you check if the drive is compatible with the logic board. If you're using the OWC though....you don't really need to use the flash chip as well -- although that would technically be a faster drive, it is likely too small and you'd need to upgrade it to be worthwhile.

Thanks. Perhaps I will move it to the new board. Since i have no idea why the original machine died I figured it would be safer to just leave the blade behind but perhaps it's not been beat as much as usual since I left the fusion setup behind at least 5 or 6 years ago. Too bad it's such a pain to get to on the backside of the logic board.