My Dell 2150cdn refuses to print duplex. It worked fine.

Can someone test something for me?

I have Dell-toner in my 2150cdn. When the black toner was reported empty, I turned the Non-Dell toner setting to on. Thus, the reporting of it being empty stopped and I could go on printing. Apparently, the toner was far from empty, I'm still printing with it.

But I have also lost duplex printing. I would like to know if that is one of the functions that is lost when turning the Non-Dell toner setting to on.

So, can someone test for me if duplex printing still works if you have Dell toner installed and the Non-Dell toner setting switched on?

Thanks,