复印机4050显示cover is open as shown close

复印机4050cover is open as shown close it是什么意思 复印机故障显示 back cover open close the back cover 激光打印机显示 cover is open cover is open plesse close the scanner cover 联想传真机M3120复印时提示 Cover is Open Close the Front Cover 是什么意思 m7020联想打印机出现以下提示:cover is open close the front cover请问是什么意思, 打印机型号：兄弟FAX-2820.不能打印 显示close the back cover open ,可是后盖是关好的 我的复印机出现close the cover ,不好用了, as is shown in ? as is shown是什么意思 出现back cover open close the back cover. 兄弟出现back cover open close the back cover.