HP Photosmart c4780

A middle of the line Photosmart printer known for fast print speeds, built-in Wi-Fi and near laser quality text output (and not to mention its extremely affordable price tag).

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door open on display

printer door is closed but still get door open on display

Answer this question I have this problem too

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THIS forum post may assist you.

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If you open the cartridge door then you will find a button type switch associated with some liver bit going inside, you need to make it sure first that whether its broken or not if its broken then you can permanently press it by putting some tape on its top.

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Dan will be eternally grateful.

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