HP 4650dn error code 51.21

[Stan1953]

HP 4650dn won't print and shows error code 51.21, and also makes a squealing noise.  Manual says to turn off and back on but that didn't solve the issue.

[Valsimot · Accepted solution]

That high pitch squeaking noise is coming out from the laser, and 51. xx is a laser error.

The printer has 4 lasers one for each colour and they are now starting to fail ( probably will fail one by one). It's possible to remove the laser and oil a laser mirror motor that will probably fix the issue, it's a complicated job.

[Stan1953]

Valsimot, Thanks for the info. I've ordered the laser and found step by step instructions for installing it.  You're correct, it's quite a complicated job.  You basically have to disassemble the printer to replace it.  It's good to know I may be able to oil the motor.  Once I have one in hand I can look it over and figure out how to oil it, then I'll have a spare if/when another one fails.

Stan

[Valsimot]

Take note that lasers are failing one by one, if you replace one that doesn't mean the other 3 are working properly or will work properly for a longer period.

[Stan1953]

Thanks for the heads up.  Hopefully I can lubricate the one I pull out and then have a spare to use for the next one that fails.  It's been a great printer and I've certainly gotten my monies worth out of it. I've considered selling this beast anyway, and it may be time to do so.  I have it for home use and can't justify a lot of expense in keeping it operational.