Look for the current OS version. For this specific guide, it should read v3.00.01.08 (or simply ending in 08 ).

What is the currently on your printer? Are you using Windows or Mac to perform the update?

The firmware fix changes how the printer reads the chip. To complete the process, you must make a physical alteration to your toner cartridge.

This is the serial number of the toner chip. How to Print Reports if the Printer is Blocked (Tech Mode)

Once the printer completes its initial reboot, you must physically stop it from reading toner chips. Pull the toner cartridge out of the bay.

Press the [+] button repeatedly until the display switches to .

Ensure your printer is connected directly to the computer via USB cable. Do not use a network connection or USB hub.

Ensure your computer is plugged into a stable power source. A sudden loss of electricity during runtime will corrupt the motherboard. Step 3: Flash the "Fix" Firmware

The FIX firmware is keyed to a specific serial number. You must change your printer's SN to match it.

⚠️ Always download firmware fixes from trusted sources (e.g., printer forums with long-standing members), verify checksums, and read the specific instructions for your exact printer model and error code.

If the light is still red, check if the chip is properly taped and the cartridge is seated correctly.

usbprns2.exe – A standard executable tool used to force binary data streams over a local USB port.



WhatFontIs the best font finder for you!