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Failed SMX750i firmware upgrade | Smart-UPS & Symmetra LX / RM

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Failed SMX750i firmware upgrade

Discussion in Smart-UPS & Symmetra LX / RM started by Kacper , 8/7/2019 8:44 AM
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Posted in: General

Failed SMX750i firmware upgrade

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  • kacper


    After a firmware upgrade to my SMX750i the serial/usb connection is no longer available and the NMC2 reports that it has lost the connection to the UPS. I've tried the brain-dead procedure but that didn't work either. On Windows the UPS shows up as a HID device but the firmware wizard is unable to communicate with the UPS, serial is completely dead.

    I've spoken to a APC representative on the phone and he basically told me my unit is bricked and that APC is unable/unwilling to repair my unit.

    I'm quiet baffled that APC is unwilling to provide repair service on a unit that cost a lot of money. Could the APC representative have been misinformed?

  • s.v.s

    Hi Kacper,

    Sorry, that must have been a miscommunication! I will contact you via the case you've opened with our tech support in order to assist with recovering your UPS.


  • kacper

    I don't think who ever I spoke to opened a support case. He never asked for my contact information just the model and serial number of my unit.

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