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Xerox error 093-335

The printer cannot read the chip (CRUM) on the toner cartridge.

Seen on: VersaLink B400 and B405. The same code can mean something else on other models.

How to fix it

1. Check the toner cartridge is a genuine Xerox one and is seated correctly.
2. Turn the printer off, wait at least 15 seconds, and turn it on.
3. Remove and reinstall the toner cartridge.
4. Still failing: try a new toner cartridge, then a new drum cartridge.

Is it worth fixing?

Almost always a cartridge problem, not the printer.