I didn't have that code before, but you can always try to reinstall or upgrade the Engine firmware before you change the CU-Board.
Hi Guys,
I have a machine (Oki C5550MFP) that when the fax is used comes up with error 0203 (CU board program failure in the service manual) i am new to oki equipment. anyone had this before i start ripping it apart???
cheers
I didn't have that code before, but you can always try to reinstall or upgrade the Engine firmware before you change the CU-Board.
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