I've got an SD card I clone every time I buy new RPi B+ and I use it as a base system with all of the software I need pre-installed and configured. It's built on Noobs 1.4.x.
The problem occurred when I bought two new boards yesterday and like always inserted cloned SD card - but RPi wasn't sending any signal over HDMI.
So I copied fresh files of Noobs 1.4.x and tried to install from scratch - same result: no signal on HDMI.
But when I loaded Noobs 1.9.2 to SD card, everything worked and installation started normally.
I compared new boards with the old ones. They all are RPi Model B+ V1.2 (c)RPi 2014. The only difference I noticed is that new ones have Elpida chip and old ones Samsung.
So the question is - why aren't they compatible? Shouldn't RPis be compatible within the same version? And what can I do to run my cloned SD card on those new boards?