Nano 33 IoT won't power up via power supply from Az-delivery model AC-05·3

Hi everyone. I'm trying to power my Arduino Nano 33 IoT, via a power supply block (220V zu 5V Mini-Netzteil kompatibel mit Arduino und Raspberry Pi – AZ-Delivery), and i welded it on both ends to some cables, going from 220 VAC to 5V. I'm getting 4.92V at the end of the cables that would go connected to the pins (as I mentioned, in theory I should be getting 5V). However, the leds on the board won't light up when connected. Any ideas? I'm connecting to the side-by-side GND and VIN to power it. Thanks in advance. When connected to my computer, the board works as expected.

If you powered your board with regulated 5v DC - you should use 5v pin on the board rather than VIN

Thanks! I tried it but got to the same result

The power supply is to small or connected backwards, Check it to be sure. It is rated at 600mA max. What else is connected. You can best power it with Vin. The Vin pin is rated at (4.5V - 21V). This is my preferred hook up point. Yea you will lose a few microwatts but the replacement cost of one board will be more than all the energy it burns up in a decade caused by a reverse connection or overvoltage. The additional filtering also helps.

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