Who's this for?
Anyone that needs to recover a device after downgrading or upgrading firmware code to an unacceptable level.
Click Properties near the top of this article for a list of supported devices.
NOTE: Lexmark does not recommend or officially support downgrading firmware levels on your device. If you do downgrade firmware to a previous version, make sure that you have fully read the latest firmware release notes for additional instructions or precautions.
What can happen?
|Your device's starting firmware code level is...||And, you attempt to downgrade to...||Which results in...|
|EC5.0 (Base* LW50.xx.P543)||EC4.0/4.05 (LW40.xx.P436/.P439)||900 service error|
|Code earlier than EC4.0/EC4.05|
This failure was caused by major code changes between EC4.0, 4.05 (LW40) and EC5 (LW50). To counter this error, you should have first downgraded to EC4.1.
* Find the current value listed on the Printer Menus settings page under Device Information.
Non-touch screen device recovery
For this example, the starting EC5.0 firmware code level is needed to recover this device.
The device will reboot automatically and return to a Ready state.
Touch screen device recovery
This procedure does not require the USB thumb drive.
The panel will indicate that it is booting using LW50.xx.P543
A similar irrecoverable error will occur if you install a Download Emulator (DLE) option card equipped with LW40.xx.Pxx code into a printer with LW50.xx.P5xx firmware code.
To recover from this situation, you can choose from any of the following options:
NOTE: Prescribe, PrintCryption, and Forms/Bar Code cards are examples of downloadable language emulators. DLEs require complimentary base code in order to function.
Still need help?
If you require additional assistance, please close this window, go to your product's support page and locate Get In Touch with Lexmark! for contact information. NOTE: When calling for support, you will need your printer model/machine type and serial number (SN).
Please be near the products described in this article to expedite the support process and reduce call-back situations.