遇到E4错误（卡纸），我该如何操作？
取出进纸区域或清除区域中的卡纸。具体步骤包括关闭打印机，降低进纸盒，清空出纸箱并打开检修门，然后清理纸张。(Page 4)
From the official HP Deskjet Ink Advantage 2800 All IN One Printer manual, page 4
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What are the steps to remove jammed paper from my HP DeskJet 2800?
取出进纸区域或清除区域中的卡纸。具体步骤包括关闭打印机，降低进纸盒，清空出纸箱并打开检修门，然后清理纸张。(Page 4)
How do I open the service door to fix a paper jam on the HP DeskJet Ink Advantage 2800?
取出进纸区域或清除区域中的卡纸。具体步骤包括关闭打印机，降低进纸盒，清空出纸箱并打开检修门，然后清理纸张。(Page 4)
What should I do if paper is stuck in my HP DeskJet 2800 printer?
取出进纸区域或清除区域中的卡纸。具体步骤包括关闭打印机，降低进纸盒，清空出纸箱并打开检修门，然后清理纸张。(Page 4)
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