@PeterBJ thank you so much for your thoroughful and most helpful explanation, much appreciated. looks like i need to find a pc :/ and refill my german cartridges.
thanks also very much to @stratman
kind regards from melbourne
canon mg 7550 bought in germany
mac os 10.12
i have a mg 7550 and it wont accept catridges in australia (i just move here)
last night i tried to get it in service mode and now it wont power up (even after disconnecting overnight).
only the orange triangle comes on, thats it. can anyone...