I found the latest software at Releases · meshtastic/Meshtastic-device · GitHub
I’m using ESPHome Flasher (ESPHome-Flasher-1.3.0-Windows-x64.exe) to download the latest software “firmware-1.2.42.2759c8d.zip”. I use this file “firmware-tbeam-1.2.42.2759c8d.bin” and upload it to “LILYGO® TTGO T-Beam ESP32 WiFi bluetooth Module ESP-32 GPS NEO-6M” 868 MHz frequency, but artifacts appear on the screen, nothing can to understand!
What is the fault and what am I doing wrong?
If you look inside the device-install.sh in the same zipfile you can see that it does a few steps more than just installing the firmware
echo Trying to flash ${FILENAME}, but first erasing and writing system information
$PYTHON -m esptool --baud 921600 erase_flash
$PYTHON -m esptool --baud 921600 write_flash 0x1000 system-info.bin
$PYTHON -m esptool --baud 921600 write_flash 0x00390000 spiffs-*.bin
$PYTHON -m esptool --baud 921600 write_flash 0x10000 ${FILENAME}
You can try to do the same steps using the ESPHome flasher.
I am not sure it will help but it is worth a try…
You can use the Desktop-GUI to flash, backup and restore your radios.
Install with
python -m pip install meshtastic-pygui
launch with
python -m meshtastic_pygui
You can download a few version of firmware as well has the MC hamster nightly build using the desktop-pygui app
Sounds complicated! 
Resolder the screen maybe? I had issues with one of my tbeams screen artifacting due to my poor soldering skills.
I have smoked a few screens myself installing them