About three months ago, I stumbled upon an issue after the assembly which wasn’t that grave back then but now it hinders me from trying out other operating systems.
So I boot up any operating system (other than pi-topOS) from an SD card.
The  logo animation keeps looping as usual and everything else works fine.
After a minute has passed, this warning appears (which was shown in this thread before).
Once about 10 seconds have passed, the pi-top shuts down.
It doesn’t matter if an SD card has been inserted or not and it switches off even after e.g. Raspbian has fully booted up.
Therefore, I decided to take a proper look inside.
The silver connector to the Mezzanine PCB fits snugly and seems to have no damaged pins.
The PCB itself is connected to all GPIO pins and they work fine with accessories like for example the Sense HAT.
Looking underneath it, the ribbon cables for CSI/DSI are also properly connected.
For some reason that problem solves itself when using pi-topOS.
The mentioned warning does appear, however it doesn’t shut down the pi-top afterwards.
After the desktop shows up, the OLED screen and its monitoring works like a charm.
- I’m using the DIY Edition with the 8GB version (Rev 1.4) - the SD card is a 128GB model, formatted to FAT32. Images were flashed with the Raspberry Pi Imager.
- I am pretty sure that it can’t be a corrupt SD card, as the same card works fine with the latest release of pi-topOS.
- I have also tried to reset the MCU by pressing the hidden switch under the gold connectors, with no success.
Thanks in advance!