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Need Help Hp L25500 firmware downgrade

Discussion in 'Hewlett Packard' started by hatirapolat, Sep 22, 2018.

  1. hatirapolat

    hatirapolat Defne Reklam

    May 24, 2009
    Turkey — Muğla
    Hello everyone
    I have many problem with my printer l25500 after last firmware upgrade.
    I want to downgrade
    is it possible? I am trying load Old firmware but Process show the Fail.
    I am sure downgrade possible but How
    Maybe I need Hp Secret or special Hp Service Software.

    I get 50.1:11 Error When Printer Starting,
    After a few minutes Printer give 79:04 error.

    50.1:11 Not listed in Servece manual. but 50.01:11 About omas Sensor
    How can I disable omas system?