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Miller 250X display not working.

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  • Miller 250X display not working.

    I just acquired a MM 250x. Unfortunately, the digital display does not work. The welder seems to work fine. Lays a nice bead, but one has to guess what the dial settings are.
    Serial # LA297125
    Control board is #196456.
    Looking at the schematics, I should get 35VDC at RC1-9. The best I can get is 28V. I cleaned contacts but no luck.

    Any thoughts as to where I look next?

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