2019 iMac broke?

[Jong875]

My iMac went from randomly shutting down, freezing and shutting down or being stuck in sleep and not being able to turn on unless unplugged from the power and plugged back in for about a month. Then today it went from not turning on from sleep, then it froze and crashed. Then I tried to turn it on and it got half way on load bar and retried numerous times then I started getting the below screen and now it is stuck on the Apple logo and I can’t get past it with command r or D. I was actually able to get the option d screen a few times after it went to only the Apple logo, but it freezes before I can even enter WIFI. PRAM and other reset didn’t do anything. I9 580x

 

[ruslan120]

Sounds like it could be a variety of issues. When my MacBook Pro stopped turning on it turned out to be a graphics card failure.

If you haven’t taken it apart it should still be under Apple’s one-year warranty.

 

[Sam Marks]

I had returned last summer an iMac 2019 i9 Vega 48 with the same problem (random crashes and restarts) until it did not turn on. The seller told me that it was a manufacturing problem. I believe it is a design (thermal management) problem. The logic board, the GPU and the CPU get hot and this damages the logic board and the GPU. My computer started to fail after playing games (Fornite) in a hot weekend. So I think that it was a case of overheating due to the thermal design. But it could be also a manufacturing problem.

I want a new Mac and, due to my experience with the last iMac i9, I am still deciding it buying a new iMac i9, iMac Pro or MacBook Pro i9 2019.

 

[mmomega]

Did you upgrade the RAM yourself?

 

[Jong875]

Yes but removed still didn’t work.

 

[Barney825]

Also have the exact same problem as of today. (2019 27 inch, i5, 580x, 1TB ssd, 24GB RAM)

Computer is 2 days old! Mac randomly restarted on day one, beechballed copying file from USB, the shut down/blacked out, not doing anything intensive (Photoshop has flies open but wasn’t working on anything at the time other than online streaming).

Have tried restarting, re-installing OS etc but hasn’t helped. Back on the phone to apple support this evening so will post back with update. Very disappointed with Apple, previous MacBook Air lasted 6 years without crashing once!

 

[Jong875]

Also have the exact same problem as of today. (2019 27 inch, i5, 580x, 1TB ssd, 24GB RAM)

Computer is 2 days old! Mac randomly restarted on day one, beechballed copying file from USB, the shut down/blacked out, not doing anything intensive (Photoshop has flies open but wasn’t working on anything at the time other than online streaming).

Have tried restarting, re-installing OS etc but hasn’t helped. Back on the phone to apple support this evening so will post back with update. Very disappointed with Apple, previous MacBook Air lasted 6 years without crashing once!

Turned out mine was A logic board issue and they are replacing it
[automerge]1571027506[/automerge]

I had returned last summer an iMac 2019 i9 Vega 48 with the same problem (random crashes and restarts) until it did not turn on. The seller told me that it was a manufacturing problem. I believe it is a design (thermal management) problem. The logic board, the GPU and the CPU get hot and this damages the logic board and the GPU. My computer started to fail after playing games (Fornite) in a hot weekend. So I think that it was a case of overheating due to the thermal design. But it could be also a manufacturing problem.

I want a new Mac and, due to my experience with the last iMac i9, I am still deciding it buying a new iMac i9, iMac Pro or MacBook Pro i9 2019.

How did you have an i9 imac last summer it just came out this summer? Anyway yes mine turned out to be a fried logic board.

 

[Sam Marks]

I meant this 2019 summer . And I think that my logic board was also fried. Luckily, I got my money back.

After my experience, my main hypothesis is that the 2019 i9 iMacs are not well prepared for the climate change effects in countries with very hot summers (44ºC to 46ºC outside during several weeks), when they can not cope with very high ambient temperatures. Otherwise it could also be only a faulty unit due to a manufacturing process.

But, I saw 43ºC-45ºC during a lot of time in the Mac Fans Control ambient temperature sensor indicator, before it died. I do not know if this temperature is OK.

 

[loekf]

I meant this 2019 summer . And I think that my logic board was also fried. Luckily, I got my money back.

After my experience, my main hypothesis is that the 2019 i9 iMacs are not well prepared for the climate change effects in countries with very hot summers (44ºC to 46ºC outside during several weeks), when they can not cope with very high ambient temperatures. Otherwise it could also be only a faulty unit due to a manufacturing process.

But, I saw 43ºC-45ºC during a lot of time in the Mac Fans Control ambient temperature sensor indicator, before it died. I do not know if this temperature is OK.

Would be very poor design from Apple it they can't handle a max ambient of 45 oC *inside* the iMac's housing. I vaguely remember that for example for logic boards inside phones they use -20 to +50 with a max delta T of 20 oC, so the cooling has to cope with 20 oC (70 oC inside components).

Officially components inside consumer products should work up to 85 celsius inside the package of an IC. The process itself up to 125 oC even.

 

[Barney825]

Also have the exact same problem as of today. (2019 27 inch, i5, 580x, 1TB ssd, 24GB RAM)

Computer is 2 days old! Mac randomly restarted on day one, beechballed copying file from USB, the shut down/blacked out, not doing anything intensive (Photoshop has flies open but wasn’t working on anything at the time other than online streaming).

Have tried restarting, re-installing OS etc but hasn’t helped. Back on the phone to apple support this evening so will post back with update. Very disappointed with Apple, previous MacBook Air lasted 6 years without crashing once!

UPDATE:

Went into recovery mode (hold command + R during start up) Booted Mac from external hard drive, erased Mac HD and re-installed OS. iMac has been working for the last 12 hrs or so now so will see how it gets on, if I don’t post back here then assume it has fixed the problem! Mac isn’t beach balling anymore when copying large files from USB so that’s a good sign.

Disappointing from Apple, hopefully it was a one off.

 

[Sam Marks]

Would be very poor design from Apple it they can't handle a max ambient of 45 oC *inside* the iMac's housing. I vaguely remember that for example for logic boards inside phones they use -20 to +50 with a max delta T of 20 oC, so the cooling has to cope with 20 oC (70 oC inside components).

Officially components inside consumer products should work up to 85 celsius inside the package of an IC. The process itself up to 125 oC even.

I totally agree with you. The iMac operating (room) temperature (and the MBP and the iMac Pro) ranges from -5ºC to +35ºC. I think that in my iMac room (my studio) I had more or less this max temperature, +35ºC during this summer. Outside, the temperatures this summer were close to the normal Mojave desert ones The iMac ambient temperature sensor I believe that is attached to the main fan, insisde the iMac case (but I am not sure).