LM15-NN-A-T2 board stopped responding

[ReX1983]

Hello,

Firstly, I wanted to congratulate you for the amazing work and the high quality documentation.

I have many no neutral switches (QBKG03LM and the other model with 1 button) and one of them dropped out from the network and stopped responding to any command, even button press. The leds stopped blinking as well.

I swapped the power / high voltage board LM15-NN-B-T4 (that hosts the two relays) with a new one and the switch returned to work, so the LM15-NN-A-T2 board is actually healthy and the failure is limited to high voltage board.

Have you encountered any similar issue or do you have any idea what could be the issue?

From a visual inspection, I can't see anything wrong with it.

On a different note, do you plan to extend support to the no neutral switches as well?