惠普打印机罢工，提示front cover door open or the toner cartridge is missing

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　　一位同事的惠普打印机罢工了，打印时提示：The hp LaserJet 1020 front cover door open or the toner cartridge is missing

　　从字面上看出现故障的原因是：前盖门开了或者硒鼓的碳粉已经用完了。

　　但打印机盖是关的，碳粉是刚加的，把硒鼓取出重装再检查打印纸盒，发现最底下的一张纸已经进了四分之一，因为有点皱，上不去了。

　　把这张卡位的纸取出，再试，打印机恢复正常。

惠普打印机罢工，提示front cover door open or the toner cartridge is missing
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