Unknown Printer

How to Identify and Fix Common Problems ?

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The printer is either low in toner, the density is set too low, or the Economode may be turned on. Remove the toner cartridge and shake it. This will redistribute the toner and often will temporarily solve the problem. However, this usually indicates it is time to install a new cartridge.
The fuse protects your printer from short circuits and power overload. It is placed between the power outlet and the switch on the left side of the printer. If your machine does not start after pressing the power switch, at first you should check if the power cable is connected to a power source.
Turn the printer off. Disconnect the power cable from the printer for 30 seconds and then reconnect. Turn the printer on while you press and hold the Resume button for 10-20 seconds.
Open HP Smart app, click your printer, click Printers in the top menu bar, and then click Diagnose & Fix. Follow the instructions if any issues are found. If you still can`t print, remove and re-add the printer.
You may see a “printer offline” error if your computer can`t communicate with your printer. This can be caused by loose cable connections or an outdated printer driver or operating system. The HP Smart app (below) can automatically diagnose and resolve printer offline issues in Windows operating systems.
Unplug and restart your printer

Turn off your printer and unplug it, wait 30 seconds, plug your printer back in, and then turn the printer back on.

If the cord is not damaged, plug it back in after at least five minutes. If you are still unable to obtain power to the device, try another power outlet. If possible, try connecting power directly to a wall outlet (as opposed to using a surge protector or power strip…just as a troubleshooting measure).
If it does not turn on, reset the power module. With the power cord connected to the printer and a working wall outlet, turn on the printer. If the printer turns on, wait 2 hours, disconnect the power cable, and try using the printer with battery power only.
Ensure that the power cord is correctly plugged into the printer and the electrical outlet. If the power cord is damaged, replace it with a new one. Try to plug the printer into a different outlet to rule out any issues with the outlet. If the power cord and outlet are okay, the next step is to check the power button.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

LaserJet 4 won't Power Up
ANSWER : I haven’t seen that particular behavior on that model. It either works or it doesn’t. My first choice would be the power supply.

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Unknown Printer

Laserjet 9000 57.5 cycle power
ANSWER : according to the manual, the solution should be replacing part RH7-5296-000CN (or use alternate part RH7-1658) for 9000 / 9040 / 9050….have you tried it? …..if you’ve got any questions, contact me, Audrey, case study writer in tech and stuff

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evenly spaced horizontal lines on hp laserjet III printout
ANSWER : The lines would be a toner cartridge problem. Which paper tray? The MF tray or the optional paper cassette?

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Unknown Printer

HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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Unknown Printer

How to copy a card slot in HP laserjet 4250N
ANSWER : None that I know of, using a computer is likely your best option but I never attempted it.

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Unknown Printer

What repair needs to be done for a "50 needs repair" message on an HP Laserjet IIIP?
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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HP Laserjet 4200 50.2 Fuser error
ANSWER : if you are using a good fuser the next part to try would be low voltage power supply

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Unknown Printer

HP Laserjet M3035xs RFU Upgrade
ANSWER : There’s no way.

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Unknown Printer