Question about HP PSC 950 All-In-One InkJet Printer
The b8142b84 error isn't documented by HP, but you should check your voltage to the printer. Move the printer to another room and plug it in to see if you still get the "turn printer on/off" message. If printer power up fine in another room, you have a bad outlet, or surge protector at its original location.
Solution to try for the cofo401 is found here:
Posted on Jan 22, 2009
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Posted on Jan 02, 2017
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