You'll need to replace the controller module, p/n TG817. You should be able to order from Dell spare parts..... sorry, I don't have the phone number.

Try this:

• Turn off the printer.
• At the left side of the printer is a door. Open it sliding it to the rear and then pulling it to the left and down.
• Carefuly remove the memory module.
• Turn on the printer and check if the problem is solved.
• If so, turn off the printer again, reinsert the memory module, and turn it on again.
• It may be solved.

Dell technical support says it may be a random error that is solved this way, or it may be a warning that something more serious is about to fail, and they urge you to buy a guarantee extension.

I hope this is useful for you.

you are solved the problem?