ESP32 don't start anymore

[magnum]

Hello,

I made a custom PCB with a ESP32-ROOM-32 and after a few cycle of use, my PCB won't start anymore. Five of my ten mountig are not working anymore with the same symptom. The power supply is OK, but when i plug a serial programmer there is nothing on the output.
It seem the ESP32 don't start !

I swapped one of the ESP32 with a brand new one and the problem still persist, i think there is a design problem with my PCB but i don't know where

Here the design

schematic.png (139.02 KiB) Viewed 9637 times

Does anyone already have the same problem ?

Thanks a lot
Julien

[ESP_Sprite]

Please follow the requirements outlined in the datasheet and the (relevant section to modules of the) hardware design guidelines. Specifically, in your case I'm missing a RC network on the EN line; you can check if that is the issue by bodging in an 1uF or so capacitor from EN to GND.

[magnum]

Hi,

Thanks a lot for your answer, i soldered 0.1uf capacitor (don't have 1uf) with no result. Still nothing in serial.
I ordered 1uf capacitor in order to make more test

According the documentation and existing PCB, i didn't difference exept the capacitor between EN and GND

Thanks
Julien