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HP LaserJet Pro 400 color M451dn - Printer - color - duplex - laser - Letter/ Legal - 600 dpi x 600 dpi - up to 21 ppm mono / up to 21 ppm color - capacity: 300 sheets - USB/ 10/100Base-TX Questions & Answers
Error code 51.23
From the HP manual.
51.XX Error, Turn off then on
Description
The product has experienced an internal hardware error.
Recommended action
Turn the product power off, wait at least 30 seconds, and then turn the product power on and wait for it to initialize.
If you are using a surge protector, remove it. Plug the product directly into the wall socket. Turn the product on.
If the message persists contact HP support.
From PrinterTechs.com
51.X PRINTER ERROR
A loss of beam-detect occurred. X description: 1 = Beam-detect error 2 = Laser error
1. Press GO. The page containing the error will automatically be reprinted. 2. Turn the printer off and then on. 3. Reseat cables to the laser/ scanner and engine controller. 4. Replace the laser/scanner. 5. Replace the DC controller.
How do I perform a cold reset?
Try turn printer off - hold down right arrow and cancel keys...Turn printer on (keepholding keys down) - when 'perm memory init' displays, release keys. Allow printer to 'boot'..
How do you fix a 59.3 error
59.3 indicates the fuser motor is not starting up.
This usually means the fuser motor needs replaced.
Part Number RM1-8609-000CN
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