My CP1025nw won't update to the newest firmware -- 20160412 . I get a success message after running the utility but the new firmware doesn't 'take'. I attempted to update using printer USB cable. The printer's device configuration page still shows old 20130826 firmware.
RFU is on, after following steps outlined in another thread. I am having printing issues where black toner splotches are appearing on right side of page. I've tried running the cleaner utility multiple times but problem persists.