HELP. Continuous Kernel Panics.

dbalone45

macrumors newbie
Original poster
Feb 3, 2014
17
1
I have a late 2015 27” IMac. Base fusion drive model. On Sunday it rebooted and starting having continuous kernel panics. Cannot stop them. Cannot boot into recovery mode. Cannot boot from external drive. Spoke with Apple Support. Maybe hard drive or bad ram. I cannot boot from external hard drive so does that mean it’s ram? Cannot really afford for Apple to fix but I am at a loss here. Did diagnostics test and it said everything was ok. Crazy.

Any thoughts?
 

Fishrrman

macrumors P6
Feb 20, 2009
17,444
5,660
Will it boot to INTERNET recovery?
(as distinguished from the "recovery partition")

Try "command-option-R" at bootup.

Have you ever added additional RAM?
If so, have you tried taking the 3rd-party RAM OUT?
 

dbalone45

macrumors newbie
Original poster
Feb 3, 2014
17
1
Will it boot to INTERNET recovery?
(as distinguished from the "recovery partition")

Try "command-option-R" at bootup.

Have you ever added additional RAM?
If so, have you tried taking the 3rd-party RAM OUT?
Yes, and I cannot. Kernel panic occurs again. It has original RAM. I was originally leaning towards hard drive but seems like it could be RAM. Should I try replacing RAM just to see what happens?

Thanks for responding.
 

Fishrrman

macrumors P6
Feb 20, 2009
17,444
5,660
If you have suitable RAM, it might be worth a try swapping it out.

One other thing to try (absolutely no promises).
1. Take ALL the RAM out, and leave it out
2. UNPLUG the iMac from the wall and let it sit for about 30 minutes.
3. Put the RAM back in, plug it in, and try again.

Sounds like an appointment with the genius bar may be in order...
 

dbalone45

macrumors newbie
Original poster
Feb 3, 2014
17
1
If you have suitable RAM, it might be worth a try swapping it out.

One other thing to try (absolutely no promises).
1. Take ALL the RAM out, and leave it out
2. UNPLUG the iMac from the wall and let it sit for about 30 minutes.
3. Put the RAM back in, plug it in, and try again.

Sounds like an appointment with the genius bar may be in order...

Yes. I do have an appointment for Monday. I can figure out most problems but this one has me stumped. Easy to use external drive, but it will not let me boot. Easy to replace RAM too. Might try to pick up some and give it a shot. Will try your suggestion first.
 

dbalone45

macrumors newbie
Original poster
Feb 3, 2014
17
1
I just tried it again and now all I get are the start up chime and further beeps. Kinda sounds like a muffled chime. That’s all it does. Then appears to shut down and do it all over again.
 

DeltaMac

macrumors G3
Jul 30, 2003
9,605
2,352
Delaware
Is that ONE beep that repeats every second? Or, do you get 3 beeps that repeat, then the same three beeps a few seconds later?
https://support.apple.com/en-us/HT201702

Have you tried removing ALL the ram sticks, except for one? Even with just a single stick, make sure that you reseat that stick, too. If you still get beeps (is it 3, repeating?), then remove that one stick, and insert another. If that doesn't help, move that stick to a different slot, and try again, then try a different stick in that same slot.
 

dbalone45

macrumors newbie
Original poster
Feb 3, 2014
17
1
Is that ONE beep that repeats every second? Or, do you get 3 beeps that repeat, then the same three beeps a few seconds later?
https://support.apple.com/en-us/HT201702

Have you tried removing ALL the ram sticks, except for one? Even with just a single stick, make sure that you reseat that stick, too. If you still get beeps (is it 3, repeating?), then remove that one stick, and insert another. If that doesn't help, move that stick to a different slot, and try again, then try a different stick in that same slot.

It’s the three times then asks like it turns off and then does it again. I have few RAM ordered. Will be here tomorrow.
 

Fishrrman

macrumors P6
Feb 20, 2009
17,444
5,660
Let us know how you make out at the Genius Bar.

Sad to say, if the cost of repair is going to be more than, say, $500, it might be time to start looking for a replacement. I'd suggest a 2018 Mini...
 

dbalone45

macrumors newbie
Original poster
Feb 3, 2014
17
1
Update on this problem.

Was corrupted software. The link between the ssd fusion drive and the regular hd had been corrupted. Tech de-linked both and then re-linked them. Works fine now. They had no idea why this happened but apparently it has happened to others too.

I have to give apple a big high five for this. After testing everything and then finding this they fixed the issue for free. Took about two total hours. Sure glad is was not anything else.
 

Fishrrman

macrumors P6
Feb 20, 2009
17,444
5,660
"Was corrupted software. The link between the ssd fusion drive and the regular hd had been corrupted. Tech de-linked both and then re-linked them. Works fine now."

Migosh, did that save a lot of $$$ and trouble!
Just software, NOT hardware (as one might be tempted to believe).

Good on ya for takin' it to the Apple Store!