Question about HP LaserJet 4 plus Printer
Reseat cables to the laser/ scanner and engine controller
Replace the laser/scanner
Replace the DC controller.
Posted on Nov 02, 2013
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Posted on Jan 02, 2017
21 is "Page too complex"
51 is "Beam detect error" or "laser error"
My question to you is, does this only happen when you are printing a page that is very graphics intensive, or does it happen with simple jobs too? It could be that you just don't have enough memory in the printer to handle some of these pages. Then again, you may have to replace the laser scanner. I advise you to call a tech out to take a look at it rather than trying to fix this on your own.
If it isn't happening too often I'd probably just **** it up and live with it if it were me. If it is getting in the way of business though you really ought to call a tech. A lot of times these things can be fixed for a lot less $ than you'd think.
Posted on Dec 22, 2009
A 52 error is a Scanner failure. Do you hear a "whirring" sound when you get the error?
That's the sound of the scanner motor running amuck.
You're probably going to have to replace the Laser/Scanner assembly or the DC Controller which controls the Laser/scanner motor.
Posted on Jan 23, 2010
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HP LASER PRINTERS 4200, 4300, 4250, 4350 ERROR 51.XX
1. Printer has a beam detect error
2. Replace the cable ***'y from scanner to D.C. controller
3. Replace the scanner ***'y
4. Replace the D.C. controller.
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