Question about HP DeskJet 3930 InkJet Printer
You didn't mention whether you had a jam to begin with but I will assume you did.
I would first try unplugging power completely since most machines don't really 'turn off' with the power switch or command sent from your PC so the error code might simply not be clearing.
Printers use a couple of different methods to detect paper jams; measure the time difference between the initial feeding of a sheet and when it reaches a small (and delicate) plastic flag or a photo cell that uses reflected light to detect the transported paper.
The flag could be jammed (or snapped off), the components responsible for detecting the paper could have failed or a photo cell obscured so it can non longer 'see' the paper.
There are only very few screws to remove in lower cost printers and the tab-slot construction goes together much easier than it comes apart; look well before prying.
Posted on Apr 11, 2008
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Posted on Jan 02, 2017
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