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Should be in a service manual. Try this site for a copy.


HP Garden | Answered 3 days ago

Be patient, it takes long time

HP Office... | Answered 3 days ago

I like how people give answers that they copied and pasted from a generic prompt system that by the way are completely useless 90% of the time. Anyways if your hp b8550 printer or similar model is giving general error code and everything else works , power start up usb connection, ect. Heres the problem and how to fix it for about $3.00. On the right side of the printer there is a panel held on by clips, pull it off. You will see a small black gearbox. Pull on it lightly, if it feels loose just pull it off and out of the printer because the center gear is cracked. Its very common for this gear to break and its only held onto the rod by compression. Anyways remove the metal clip to expose the gears, there will be three, examine the middle one, if it is indeed cracked, you will need to get a replacement online, it is a hp 15t gear. Once you replaced gear, with power off, move carriage all the way to the right and hold there while pushing gear box back onto rod. Good as new. $3.00 and about 10 min of labor. A child could do it but all these so called experts want to charge an arm and a leg and probably not even fix it.

HP Photosmart... | Answered on Apr 22, 2019

software driver , usb cable and usb port check

HP Laserjet Pro... | Answered on Apr 21, 2019

Make sure you have good consumables (print cartridges AND printheads). Sometimes calibrations don't happen when the proper ink pattern is not laid on the paper and then scanned by the machine.
One other thing to look for...when the carriage moves back and forth during calibration, you should be able to see a small blue/green light on the side of the carriage assembly when it moves back and forth. No light, bad sensor. If you see a light then the cover that protects this light may be stuck closed. Some things to look for...good luck

HP DesignJet... | Answered on Apr 20, 2019

Sounds like you have power but just a blank screen which usually points to the formatter. Before replacing formatter Part#CN727-67042 try uninstalling/reinstalling the formatter.

HP Designjet... | Answered on Apr 20, 2019

Won't be an inexpensive fix...good luck

HP Designjet... | Answered on Apr 20, 2019

Is it all the colors? Make sure the drum shutters open and close when opening and closing the front door. Missing magenta color is common in this machine and other machines like it. The magenta laser scanner mirror sits in the lower part of the printer and face up and toward the front of the printer. Loose toner from printing tends to settle on this mirror. Over time the mirror coats over and the actual laser scanner beam cannot reflect off the mirror with proper intensity, usually resulting in very faded magenta color or no magenta at all. Good luck

HP LaserJet... | Answered on Apr 20, 2019

Transfer Belt Error Error code 59.FO. Replace the belt.

Don't confuse with 59.CO which is a machine problem, usually related to develop disengagement assembly. If someone has previously worked on it, then all it may need is a main assembly removal and replacement, with replacement being done to HP specs. (gear alignment and so on)

HP LaserJet... | Answered on Apr 20, 2019

the squeal may be due to the fact that the paper tray won't lift...the lift tray should give just a bit. make sure there is not something under the tray where it won't go down. and if it doesn't go down, then the pickup roller can't rotate, and you get the noise. best answer with info. given

HP LaserJet... | Answered on Apr 20, 2019

The Laser Scanners go out in the 2200/2300. Based on the noise you describe, high pitched screech, the laser scanner needs replacing. However, if you push the large go button, you will get a secondary light code that will tell you specifically the problem and then go google the secondary error light pattern for 2200's.. Good luck

HP LaserJet... | Answered on Apr 20, 2019

I believe you may have misanalyzed the application. Make your point of reference the flywheel side of both engines. The crankshaft rotation will be the same for both engines (possible rare exceptions, asia).

If you mean change the rotation of the engine, then no. That is possible only with specific designed 2 cycle engines (think golf cart).

HP Garden | Answered on Apr 20, 2019

I could not find a scanner error 2.
But frequently the scanners in these units require replacement. Unless you have it under maintenance contract the cost of repairs could be prohibitive in a unit this old.
Here is the service manual if it will help you define your problem better.

HP LaserJet 3052... | Answered on Apr 20, 2019

Check your toner cartridge first.
There is more than one cause for this problem. It could also be your transfer roller that needs to be replaced.
Or it could be the scanner that has gone out.
Are you getting an error code?

HP LaserJet... | Answered on Apr 20, 2019

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