I am caught up in a strange problem that my flashed sd card with Raspian Buster OS works fine with approx 10 of my Raspberry pi-4 but the same is not working on another batch of Raspberry pi 4. I simply get four times blinking of the green led in a pattern indicating that the os is not booting.
So why is this happening? Because my simple guess is if the sd card works in one Rpi4 then it should work in all. Am I missing something? Kindly help.
Edit: If I boot through a newly updated os then all the raspberry pi are working. So no issues with the hardware. The only issue which comes is I am not able to read RFID cards with this. Hence I wanted to stick to my older version of os which is failing to boot in some raspberry pi-4 but working in others.