50.4 FUSER ERROR ON HP LASERJET 4250n

turn the printer off for at least 20 minutes, then cycle power. If the 50.2 fuser error occurs again, you may need to replace the entire fuser assembly OR you will need to replace the power supply.

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Hey Joe,
This is what the HP Website has to say about it:
50.X FUSER ERROR Description A fuser error has occurred. Action

1. Turn the printer off.
2. Verify the fuser is properly installed and fully seated.
3. Turn on the printer.
4. If the message persists, contact HP Support.

BUT! you can try performing a cold reset, and maybe this would help:
500, 3550, 3700, 4600, 4650, 5500, 5550, 8500, 8550, 9500) use the instructions below. 1. Turn the printer on.
2. When the memory starts counting on the control panel, press and hold the green SELECT button. Continue to hold green SELECT button until all three Control Panel LED's are illuminated and on solid.
3. Release the green SELECT button.
4. The control panel will display SELECT LANGUAGE.
5. Press the DOWN ARROW button until control panel displays COLD RESET.
6. Press green SELECT button. The printer will perform a cold reset and then continue its power-on sequence.

Good luck!

Replace the Fuser, it is behind the back door Part # RM1-1082.

Remove back door and push two blue tabs on fuser, remove and replace.

A 50.4 code is bad line voltage. Don't plug it in a surge protector.
Any other 50 error is a fuser problem. Turn the printer off for at least 10 minutes. Power it back on. If the error returns, replace the fuser.

Replace the fuser unit (they last about 75K pages in my experience)

1. Power down the printer and unplug it
2. Remove the fuser from the back side of the printer
3. Replace the fuser unit with a new one
4. Turn the printer back on

Yes they will

This series of printer has an inherent fault with what they call the Fuser Swing Plate. It's a small metal plate that contains a couple of cogs, one of which drives the fuser assembly. HP found that the fuser drive cog on his plate encountered excessive wear and would then cause a sometimes, quite loud whirring noise from the back of the printer.The only way to get around this is to have another, new, updated Fuser Swing Plate fitted to the printer.

Hi,

A 50 Service error is a fuser error. Turn the printer off for 5 to 10 minutes, then turn it back on. If the error is still there, I think your going to need to make a service call you can try reseating the fuser, but be sure to let the fuser cool completely before touching it.
Good Luck the HP Laserjet 4p is a great printer.

Put a maintence kit in your machine, easy install, everything just clicks in, Every 200 000 prints it should be done, it includes the fuser, all feed rollers, sep pad and transfer roller.

These are great printing machine, they only ever need the MK and on this model a fuser drive gear wears and get noisy, but once that has been done once, it is ok from then on.
KIts seem expensive but they are meant to last 200 000 prints and usally do. These are one of the best most reliable printers in the market.

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