Why Use Epson WP-4020 Firmware Key
– Epson WP-4020 downgrade firmware key: this is required when NON-ORIGINAL ink cartridges are NOT recognized by the printer. This is because printers’ firmware has been updated from the Epson server to the newest firmware where not original ink cartridges are forbidden to be used. In this case, You have to Downgrade firmware back to old.
![Epson WP-4020 Incompatible Ink Cartridge Epson WP-4020 Incompatible Ink Cartridge](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 12.jpg)
– When the Epson WP-4020 printer is updated to the new firmware, only genuine ink cartridges are received but not compatible ink cartridges. If we try to insert a compatible ink cartridge into the WP-4020 printer, the printer will warn not to recognize the cartridge and give error messages: Epson WP-4020 Incompatible Ink Cartridge, ink cartridges are not recognized, the ink cartridge is not recognized.
– This article shows how to downgrade the firmware version for Epson WP-4020. Fix Epson WP-4020 printer error not recognizing external ink cartridges: Epson WP-4020 Incompatible Ink Cartridge, ink cartridges are not recognized, the ink cartridge is not recognized.
– After Downgrade Firmware for Epson WP-4020 printer, the printer can recognize the ink cartridge or we can install a compatible ink cartridge for Epson WP-4020 printer.
– Epson WP-4020 firmware key can fix data recovery mode errors, freezes, and cannot boot into normal mode.
How to downgrade firmware Epson WP-4020
– Unplug all USB connections to the computer except keyboard, mouse, and Epson WP-4020 printer need to downgrade firmware version.
– Download Downgrade Firmware Epson WP-4020:
– Free Download Software Downgrade Firmware Epson WP-4020 for Windows:
– Free Download Software Downgrade Firmware Epson WP-4020 for MAC OS:
Step1.: Install the Wicreset software, then check if the Epson WP-4020 printer is supported with the firmware change feature:
![Key Firmware Epson WP-4020 Step 1 Key Firmware Epson WP-4020 Step 1](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 1.jpg)
– If supported, we see how to enter Service Mode (Update Mode) for Epson WP-4020 color printer
Step2.: Connect the Epson WP-4020 printer to the computer with a USB cable, then click Change Firmware to see how to enter Service Mode.
![Key Firmware Epson WP-4020 Step 2 Key Firmware Epson WP-4020 Step 2](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 2.jpg)
– How to enter Service Mode:
![Key Firmware Epson WP-4020 Step 3 Key Firmware Epson WP-4020 Step 3](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 3.jpg)
Step3.: Select Epson WP-4020 printer to Downgrade Firmware.
![Key Firmware Epson WP-4020 Step 4 Key Firmware Epson WP-4020 Step 4](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 4.jpg)
![Key Firmware Epson WP-4020 Step 5 Key Firmware Epson WP-4020 Step 5](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 5.jpg)
Step4.: Select Epson WP-4020 printer then click Update.
![Key Firmware Epson WP-4020 Step 6 Key Firmware Epson WP-4020 Step 6](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 6.jpg)
Step5.: select Yes to continue.
![Key Firmware Epson WP-4020 Step 7 Key Firmware Epson WP-4020 Step 7](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 7.jpg)
Step6.: Enter the Epson WP-4020 Firmware Key, then click OK.
![Key Firmware Epson WP-4020 Step 8 Key Firmware Epson WP-4020 Step 8](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 8.jpg)
Step7.: Wait for the software to automatically downgrade the firmware version for Epson WP-4020 printer.
![Key Firmware Epson WP-4020 Step 9 Key Firmware Epson WP-4020 Step 9](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 9.jpg)
Step8.: Click OK to complete the firmware version downgrade process for Epson WP-4020 printer.
![Key Firmware Epson WP-4020 Step 10 Key Firmware Epson WP-4020 Step 10](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 10.jpg)
Step9.: Check the WP-4020 printer firmware after downgrading the version.
![Key Firmware Epson WP-4020 Step 11 Key Firmware Epson WP-4020 Step 11](https://chiplessprinter.com/wp-content/uploads/2022/firmware_wic/Key Firmware Epson WP-4020 Step 11.jpg)
Video tutorial to downgrade Epson WP-4020 printer version:
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