I threw out the 5.1 V / V converter unit completely, unsoldered the board. And the power supply started without this board. The transistor U604 042N03LS broke through it. And probably the U31460 chip. But I do not need 5 volts.
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I threw out the 5.1 V / V converter unit completely, unsoldered the board. And the power supply started without this board. The transistor U604 042N03LS broke through it. And probably the U31460 chip. But I do not need 5 volts.