T-Beam TTGO v1.1 : OLED not working

Hi there,

I’m reaching out because I just received my 2 brand new T-Beam v1.1 433Mhz not soldered OLED (LILYGO® TTGO Meshtastic T Beam V1.1 ESP32 LoRa 433/868/915/923Mhz, WiFi GPS NEO 6M avec affichage OLED pour Arduino | AliExpress).

After installing required USB drivers (GitHub - WCHSoftGroup/ch34xser_macos: MacOS USB driver for USB to serial chip ch340, ch341, ch342, ch343, ch344, ch9101, ch9102, ch9103, etc), I flashed the devices with the latest firmware, using ESP-Flasher (version 1.2.60).

Then, I soldered the OLED displays.

I powered on the devices using USB cable plugged in my computer (no battery).

And… no displays are working…

Where am I wrong?

I don’t know what to do …

Thanks a lot for your insights!

Those soldering joints look like they need some work, should look like Hershey kisses


Solder joints look odd, reflow them.

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I will resold both screens and let you know :-). thanks a lot for your answers!