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How to Identify and Fix Common Problems ?

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I found the following: Error 50 means that the heating of the fuser unit is no longer working. This is usually a burnt-out heating lamp,or a defective thermal fuse.
HP Smart app might display the “Printer status unknown” error message if your printer is idle or offline. If your printer goes into sleep or standby mode after a period of inactivity, press the power button to “wake” it.
Turn the printer off, wait 10 minutes, and then turn the printer on. 2. If the message persists, reseat the fuser. If that does not work, replace the fuser.
It could be anything from a blown formatter to just a corrupt print job. Test: Disconnect the network cable and do a cold reset. If it comes up to ready, it was probably just a bad print job. Delete everything in the print queues and reboot the PCs.
Er/30 or Er/50 to Er/55 displays and the Attention light is on. The printer is in an error state. Reset the printer to resolve the issue. With the printer turned on, disconnect the power cord from the printer.
Error 50 is Invalid destination number. Are you trying to send a shortcode?
Switch off and restart the printer.

Sometimes this is all that`s needed to solve this. If there are any jobs in the queue that can`t be shifted, a restart should flush these out. Now try and print. More often than not, this should resolve the problem.

Error code 50 in the USB drive means users cannot move or copy files from external devices such as USB drives. Multiple reasons can lead to this error, such as corrupted NVRAM/PRAM, system files, etc.
The BCCode 50 usually occurs after the installation of faulty hardware or in the event of failure of installed hardware (usually related to defective RAM).
The 59.40 is a “fuser rotational error“. Meaning the fuser was unable to rotate causing this error.
Turn the printer off, unplug the printer from the network/computer, clear any pending jobs from the print queue (on the computer), then reboot the printer to make the 49 error disappear. Then you can reconnect the network/computer cable and try printing again.
Most times the 49 error is a firmware error and not a driver error. It is usually casued by a bad print job trying to print and confusing the printer. You need to disconnect the printer from the computer and/or network and turn the power on and see if the printer comes to ready.
Error 50.2 suggests the fuser can`t heat up properly. This might be fuser failure but could also be a power supply issue. Plug the printer directly into a wall socket, not into an extension. Try turning off, wait 20 minutes then on again.
The printer experienced a black drum motor M3 error. 59.05. 50 Black drum motor startup abnormality.
50.2 error indicates that the printer is not heating up fast enough. This can be caused by a bad heating element in the fuser but can also be caused when the printer does not have adequate power due to overloaded circuits or being plugged into a power strip or surge bar that limits current flow.
The 50.1 fuser error message refers to a low temperature reading on your fuser. If you see the error message “50.1 Fuser Error” on your HP Color LaserJet 2820 or 2840 series printer, you probably need to replace the fuser. Fusers are a consumable part and are sold as part of a maintenance kit.
(From: Tom Dunn ([email protected]).) Error code 51 indicates loss of laser beam for over 2 seconds. Check -5 V, also make sure there is no interlock mechanism damage, and +5 V at J451-1 on Laser Drive PCA. You may need new laser unit.

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ANSWER : I don’t know what you mean by good toner cartridges. They haven’t been built in about 10 years, so if they are new OEMs in the box, they are guaranteed to fail. The 50 error on that printer is mostly a burned out fuser lamp. This site was sold, so as you can see, there are no more kits available.

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