@B083Rt where u do npm start, type this in advance

export ELECTRON_DISABLE_GPU=1

then execute
npm start

this should turn off the electron use of the gpu chip.

if you use a script, u can add this before it’s npm start

also, run my install script it does all the setup.

flash again then run install
https://github.com/sdetweil/MagicMirror_scripts