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I had the same problem after transit of copier. Try removing the yellow developer unit and give it a good shake. You may need to do it with the other units too.
Self-diagnosis error: Standard NVRAM
The controller cannot recognize the standard NVRAM installed or detects that the NVRAM is defective
• Loose connection
• Defective standard NVRAM
• Defective controller
1. Turn the main switch off and on.
2. Check the standard NVRAM is firmly inserted into the socket.
3. Replace the NVRAM.
4. Replace the controller.
Did you take out the toner cartridge and paper trays and open all the covers to try to find the misfeed? If there is really nothing there, you can try turning the printer off and back on to see if it clears itself.
The main fuse is close to where the cord plugs into the machine. You can follow the wires, (black white and green) to an inline fuse or the main power board.
The vertical box on the left side of the machine is not closed all the way. Open it, and close it again. It is directly on the left side of the main machine.
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