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I have just replaced the logic board on my MBP after the previous one failed. I had it diagnosed at an authorise apple repair centre who confirmed this was the issue. Rather than pay the high price for them to fix I have opted to do it myself using a second hand logic board. I have installed the board using the iFixIt instructions and all seemed fine, the machine powers up and runs correctly. The only issue I encountered at first was that I had to format the ssd and use recovery mode to reinstall MacOS. However, after running it for a while I unplugged from the AC adapter and the Mac immediately lost power and shutdown. The battery itself has charged whilst plugged in and shows as 100% charged. I have tried all the options such as resetting NVRAM, SMC etc, I also opened it back up to check all cables connected properly. I have booted into the Apple Hardware Test and it reports no issues. Battery health shows as normal, cycle count is 134. The other odd behaviour I see is that it will boot up immediately when plugged into ac power, rather than waiting for me to hit the power button. I have read a lot of posts about similar issues to this which usually recommend resetting NVRAM / SMC but none of these help. I’m pretty sure the machine didn’t behave like this before. So, I’m trying to check / rule out any other issues before going back to the seller I bought the logic board from. I am wondering if this is likely an issue with the replacement logic board? Thanks!
Hi, it all checks out ok in the Hardware Test, no problems indicated. I’ve ended up contacting the seller I bought the logic board from and I’m just going to return it, get a refund and buy another, they agreed that there must be a hardware issue with this one.
