Hello,
I have iMac 27 5K 2019.
On the startup, mac will random shut down on 1-2 second from start.
After shut down is displayed only 2nd diagnostic LED.
I checked other power supply, new BIOS, new processor, new RAM, resetting NVRAM, SMC, RTC battery and checking visible damage.
Anyone have this problem or solved?

I have iMac 27 5K 2019.
On the startup, mac will random shut down on 1-2 second from start.
After shut down is displayed only 2nd diagnostic LED.
I checked other power supply, new BIOS, new processor, new RAM, resetting NVRAM, SMC, RTC battery and checking visible damage.
Anyone have this problem or solved?
