OKI ES7411 or C712 is not powering up

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  • Germanbizhub
    Junior Member
    • Jun 2025
    • 3

    #1

    OKI ES7411 or C712 is not powering up

    Dear friends,

    i've got an OKI ES7411 which is not powering on - when i turn on i makes a short clicking sound and nothing happend. Luckily i got an C712 (is working), which is mostly the same with ES7411 to replace the Power supply. This was mostly my thought that the failure will disappear - but it didn't. Changed the switch as well... I have no deeply experience with this model - i'm only an konica /kyocera / brother typ of technician. Has someone knowledge about it? I would think Mainboard - but most brands even showed up with an error code, when main is defective.

    Thank you in advance.
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