Does anyone knows how to use an Apple Potassium J137 ALDA568568 to see iBoot messages of a MacMini 2018?
I was told its to be used with Apple ktools ... where can I get it?...

Yes they have if you are first owner!
Since I bought second hand I think I cannot ask it...
I already searched that possibility over internet.
Many thanks

Hi there,
I have a SK Hynix HMAA4GS6MJR8N-VK 32GB 2Rx8 PC4-2666 DDR4 with bad ram.
Does anyone have the schematics / datasheet of this memory module?
I would like to know the LSB byte order of each chip as to be able to replace defect chip.
Memtest shows 32kb bad blocks on chip 2.
Thanks,...

Many thanks for the 820-00939 board layout.

[COLOR=#2980b9][I]> The PCH corner hotspot is a little suspicious I must admit, but I've never observed the thermal behaviour of another one.[/I][/COLOR]
Agree ...

Here goes the thermal videos:
[URL]https://www.youtube.com/watch?v=ZCBVia11jbs[/URL]
[URL]https://www.youtube.com/watch?v=k8Num0ntcis[/URL]

[COLOR=#3498db][I]> Could you upload the thermal images here?[/I][/COLOR]
Yes, please find them attached. One is from another MacMini8,1 which runs well.

[COLOR=#3498db][I]>...

Board number is 639-06007

Measured power rails to PCH and so far 1V, 1V8 and 3V3 seems to be Ok.
If there were a way to sniff the boot messages by usb or other means would be very useful.
I suspect either PCH is malfunction (as thermal images suggest) or some peripheral connected to it.

I'm using a memory stick which is working well in another mac mini 2018.

I'll try check power rails of Thunderbolt Controllers tomorrow and PCH clock signals.

Do you have a board layout of mac mini 2028 with traces and pads labeling similar to ZXW...

Hi,
I've bought a MacMini 2018 listed on eBay for parts.
Blinking STOP sign upon startup.
Read the SocROM with XGecu T48 but Mac Efi Toolkit is not able to find Serial Number.
Searching on EveryMac for ORDER NQ2Y2LL/A gave no result.
Any suggestions to find serial number?
No key combination uppon startup gives any result, only was possible to start in DFU mode and revive/restore.
Then machine reboots and goes to blinking STOP.
Thanks...