I get a white line through but it is not telling me to change toner?

This can occur if you receive a lot of faxes that may have a vertical block or a lot of text or pictures etc. in the same location on the page. The toner can be used in that particular area of the page and a white line results.

Remove the toner cartridge from the fax, keep it horizontal. Shake it side to side whilst keeping the cartridge horizontal. This redistributes the toner inside the cartridge. Replace the toner cartridge in the fax.

Hope this helps.