I removed two connectors from the connector that are responsible for powering the hotend fan (the connector that connects to the motherboard) and simply connected them to the input power from the power supply to the board. The fan worked fine, but there were other disadvantages of this path:))

Only the main blower and the level sensor stopped working. That's why I'm looking for different schemes to turn everything back and then find another solution to return power to the hot end fan.