open thefront cover,then replace the toner cartridge with a new

open thefront cover,then replace the toner cartridge with a new 传真机出现 cover open open front cover replace toner 出现back cover open close the back cover. 复印机故障显示 back cover open close the back cover cover is open plesse close the scanner cover 出现back cover open close the back cover.联想7020出现back cover open close the back cover. 请问这英语是什么意思：printer cover open 打印机佳能MF3110出现open printer cover 传真机出现< front or rear> cover open 出口保险单里的OPEN COVER open cover,then remove jammed paper. 请问colse the back cover open Back cover open ciose the Back coverclose 英文OPEN BACK COVER THEN REMOVE PAPER 谁说下 open scanner cover thenreinst.all ink cartridge是什么意思? 兄弟打印机报open rear cover remoye paper 复印机4050显示cover is open as shown close