After updating the firmware to V5.2.3, the UPS stopped working

Hello

I have a similar problem.
After updating the firmware to V5.2.3, the UPS stopped working. After switching off and on the power supply, LED 1 (O.K./BAT), LED 2 (BAT.> 85%), and LED 4 (BAT.STATUS) are light green. After inserting the USB connector into the IPC, the UPS switches itself off and disconnects, indicating a hardware fault (LED 1 is permanently red).

Do you have any idea how to solve this problem?

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Split from SITOP UPS1600 Hardware failure after firmware update.