EMS-ESP stopped working, hardware failure?

I installed EMS-ESP on a Wroom ESP32-S3 DevKit. Everything worked pretty well for a long time. Then I wanted to change the WiFi network that the ESP32 is using, entered the new credentials, rebooted, and since then everything is basically dead.

It does not connect to either the new or old WiFi network. Also, it does not create its own WiFi AP which it should do when it can’t reach the networks.

When I try to use the EMS-ESP Installer, I can connect to the board on COM10. Then, I can open the console, but I can enter whatever I want, there just is no response to any command.

So basically it’s unreachable for me and I decided that I have to reinstall the firmware and start from scratch. Using the same tool, when I try to install the current firmware, it says

Failed to initialize. Try resetting your device or holding the BOOT button while clicking INSTALL.

Resetting or holding the BOOT button while clicking INSTALL changes nothing, same error pops up again.

Next thing I tried was the EMS-ESP Flash Tool. I don’t know why, but this tool always shows me two COM10 ports. However, chosing one and trying to install, I get this error:

Unexpected error: ESP Chip Auto-Detection failed: Failed to connect to Espressif device: No serial data received.
For troubleshooting steps visit: Troubleshooting - ESP32 - — esptool latest documentation

Tried the same thing while holding the BOOT button BEFORE booting the esp32 - same error. And yeah, right now I’m out of ideas and options. Seems like the ESP32 is dead and I can’t do anything with it.

Maybe someone has another idea what I could try, but I guess I’ll have to order a new board…