crwdns2934241:0crwdne2934241:0 Zhenxing Hu

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It is noise when putting toner in or printing!

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When I start my printer without toner, it is quiet. But when I put toner in it, and  restart printer, it is noise. When I print documents, it has terrible noise. What happen? thanks.

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Canon ImageCLASS MF4350d

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open