mfc-7420出现open the front cover then replace the toner cartridge with a new one换了粉也不行啊,

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mfc-7420出现openthefrontcoverthenreplacethetonercartridgewithanewone换了粉也不行啊,mfc-7420出现openthefrontcove

mfc-7420出现open the front cover then replace the toner cartridge with a new one换了粉也不行啊,
mfc-7420出现open the front cover then replace the toner cartridge with a new one
换了粉也不行啊,

mfc-7420出现open the front cover then replace the toner cartridge with a new one换了粉也不行啊,
把粉墨盒左面的白色旋转转到上面就可以了