Burned or Bricked raspberry 4b - no 3.3v
Hi, im setting up my custom printer and i want to use RatOS for idex mode. Setup:
Kraken v1.0
rpi 4b / 3b+
2x ebb42
orginal vaoc camera ect
Problem is that everything was working ok, i configure printer mostly and nearly everything was working.
I plugged VAOC camera to USB HAT, nothing happen so i click button "Reboot" under Host Control.
After that i loose 3.3v on the pi (green status LED, also checked with multimeter on the GPIO, 5v is there)
With 3b+ 1gb ram everything work fine afther that.
And now i have 3 bricked raspberry pi 4.
Before that last situation that is above i've had also problem with GND connections on RPI (some potential beetwen USB C on RPI and USB C plug, power form dedicated power suplly, so i cut the cable and take the GND to GND of the machine to be sure its ok, and after that, that problem go away so i take another pi to test it).
But problem don't go away, and third one bricked.
Need help. Same OS from microSD goes again on the 3B+ so i can provide any logs.
I think it can be weird problem with power delivery on rpi 4b, i dont belive is electrical problem because 3b+ works fine but has only 1GB ram so not to much for what i need.
Also standard Rapsberry pi OS won't boot so the raspbbery pi is bricked somehow but i don't know what is wrong.
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Ok, weird thing. I pulled out MicroSD card and somehow 3.3V came up on LED status and on multimeter so can it be the system thing? On 3B+ works with no problem, on 4B+ i can get it stable.
Update: After that kind of a reset i reinserted the SD card and it somehow start working so maybe rest of them are not bricked also but still look like weird OS stuff that blocking 3.3v so not good.