Firmware downgrades with HP Web Jetadmin

[BradyMarco]

I am trying to downgrade printer firmware for a customer in bulk remotely using WJA. Specifically the HP E42540. I found a few things that said Auto updates will have to be disabled and downgrades enabled, but is it possible to downgrade at all in WJA?

FYI, The newer firmware is messing with their in-house software. 

[Meghana_10]

Hello @BradyMarco, Welcome to the HP Support Community.

Thanks for reaching out about your query regarding the HP LaserJet Managed MFP E42540 series.

We appreciate the opportunity to assist you and are glad we could help work toward a resolution. We hope our support has been valuable.

Yes, HP Web Jetadmin (WJA) can push firmware files, but HP Enterprise/Managed architecture generally blocks installing an older version over a newer one via standard remote deployment tools. 

For HP LaserJet Enterprise / Managed and PageWide Enterprise / Managed (which includes models like the E42540):
 

• If you attempt a remote downgrade via WJA, EWS, or device maintenance to a version older than FutureSmart 4, the downgrade fails and you get:
• Control panel error 99.02.32 Downgrade error
• Event log error 33.05.09
• This is due to a security feature that:
• Requires someone to be physically present at the printer to perform a downgrade.
• Prevents HP SureStart printers from being downgraded remotely.

HP’s recommended method if a downgrade is absolutely necessary:
 

1. Do not use WJA for the downgrade.
2. Use the Preboot menu with a USB flash drive on each device: - Downgrade via Method three: USB flash drive – Preboot menu as described in the HP firmware update documentation.
3. Be aware: - Downgrading resets the device to factory settings. - All solutions, stored jobs, and current settings are lost. - HP recommends using the latest firmware whenever possible.

Have a great day!