https://devzone.nordicsemi.com/f/nordic-q-a/124221/54l15-usb-issueThe customer soldered the 54L15 module to the TB-M54L15 board, unplugged the USB, and used the EVB&#39;s SWDCLK, SWDIO, 3.3V, and GND connections to perform earase and read operations on the 54L15. However, I then disconnected the EVB&#39;s SWDCLK, SWDIO, 3.3Ven-USTelligent Community 13Mon, 08 Sep 2025 12:36:56 GMThttps://devzone.nordicsemi.com/thread/548056?ContentTypeID=1Mon, 08 Sep 2025 12:36:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1f3b983d-d110-4b11-aafa-05536a47e4d4mathiaso<p>Hi, Randall.</p> <p>I&#39;m unsure if I&#39;m able to grasp all the details here.</p> [quote user=""]Upon checking, I realized the 54L15 module&#39;s 3.3V was shorted to GND.[/quote] <p>Could you please provide some more insight to this short between 3.3V and GND?</p> [quote user=""]The customer soldered the 54L15 module to the TB-M54L15 board[/quote] <p>Which specific 54L15 module are they using? Do you have some more information about this board?</p> [quote user=""]Then, plugging in a NB&#39;s USB power supply, I measured the LDO power supply on the board and found no 3.3V.[/quote] <p>What do you refer to by &quot;NB&quot; here?</p> <p>Best regards,<br />Mathias</p><div style="clear:both;"></div>