HP Color LaserJet 4550N
I love my old 4550N, when booting up the display shows it counting memory then go to asterisks, followed by no warm up or calibration, after reading a number of these post I’m assuming it’s the formatter board.

Experienced technical support provide their insights in answering this question :
You can replace it by finding the slot of DIMM, where the existing HP4550N formatter board is installed. More info is available here

How to Identify and Fix Common printer Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

The Epson PLQ 20 Formatter Board which is also known as Epson PLQ 20 Main Logic Board or Epson PLQ 20 Logic Board is the most important part of the printer that converts print data into electric voltages to be used by the printer engine result in print.
A formatter board is a device whose job is to translate signal from a printer device. It receives print data from the computer system and processes it to produce an image and pass it on to the Engine Control System.
A formatter will design the interior of your book and typeset the text so it`s ready for printing and uploading to ebook marketplaces. You can format it yourself, or if you want to skip the headache, you can hire a designer to do it for you.
A printed circuit board (PCB; also printed wiring board or PWB) is a medium used to connect electronic components to one another in a controlled manner.
Code formatters are automated tools that help you format source code automatically. The main purpose of code formatters is to standardize the formatting of code across a project or team, making it easier to read and understand code.
Where linting typically focuses on the behavior of your code, formatting focuses on your code`s style. At first glance, formatting may seem unimportant, but formatting helps keep a code base consistent so that the code is more easily read and understood.
Windows Disk Management – Free Built-in Disk Formatter for Advanced Use. Windows Disk Management is a free Windows built-in tool, which means you can easily open it on your computer without downloading. It comes to use when you`re trying to format a drive that is not showing up in the File Explorer.
The PrinterLogic Board is the main printed circuit board (PCB) present in computers and other expandable systems. Features: • Compact shape. • Accurate output. • Microprocessor.
PRINTING ON WOOD

Much like the other choices, there are a variety of ways to display an image on wood. Prints can be heat-mounted on medium density fiberboard (MDF) and laminated for a clean, frameless look that retains the color of the original image.

PDF is the most commonly used file format for printing documents and graphics.
When printing raster images, RAW file formats usually offer the best resolution. Unfortunately, there are a lot of printers out there that don`t accept such a large and uncompressed file. Alternatively, some printers use TIFF/TIF, a file format popular in the photography and publishing industries.
The moral of all this is: do not swap formatters and dc controllers between machines for troubleshooting purposes unless you must, and then be aware that it may cause identity problems. And do not remove both boards at the same time.
The PrinterLogic Board is the main printed circuit board (PCB) present in computers and other expandable systems. Features: • Compact shape. • Accurate output. • Microprocessor.
Formatter Number: The barcode label on the formatter provides the formatter number and is useful when replacing the formatter. SCB: Indicates the Scanner Control Board of the printer and lists the scanner version.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP 4550N formatter board
ANSWER : You can replace it by finding the slot of DIMM, where the existing HP4550N formatter board is installed. More info is available here

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HP Color LaserJet 4550N

HP 4550N formatter diagnostics
ANSWER : With power off, pull out the network card. Power on and try again. Also, if any memory is installed on the formatter, pull that off and try that.

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HP Color LaserJet 4550N

Formatter board repair (HP 2200, 4100, 4600 etc.)
ANSWER : Yes i have two printers one is hp laser jet p2055dn when i print test page,it print blank page and create jam inn cartridge area and another one is hp laserjet enterperise M606,When i try to print tests page,it does not print but give me error code 50:00:00 on the contral panel,who can help me with these printers problem Thanks

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HP Color LaserJet 4550N

Hp 4550n error 57.3
ANSWER : Any of the 57 errors on the HP LaserJet 9000 , 9040, and 9050 series printers are fan errors. There are 7 fans in the machine. Replacing the corresponding fan usually cures these errors; fans are a common failure part on this model. Potentially a failing DC controller could also cause a fake fan error, but that is not common. Below is a description of each fan error, and the corresponding part# for that fan.

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HP Color LaserJet 4550N

HP 26 vs HP 29 cartridge compatibility
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HP Color LaserJet 4550N

HELP! HP Color Laserjet 5500dn (formatter prob??)
ANSWER : Italiano:

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HP Color LaserJet 4550N

HP laser jet 3015 "Upgrade Error Call HP Support"
ANSWER : rgtr

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HP Color LaserJet 4550N

HP 9040 MFP Error code
ANSWER : bonsoir

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HP Color LaserJet 4550N