Connect IR Diode

For some reason the IR-Diode connected to my Node MCU ESP8266 stopped working.
I changed the IR-Diode because i realised it only requires 1.5V not 3.3V. I added two resistors two split the current but still it´s not working.
I can flash a programm on the Node MCU only if its not pluged into the circuit. I´m really confused can anybody help me?

(I have already tried another Node MCU with the same result)

Your post ended up in the German forum. I hope the mod will move it…

Measure the voltages on every accessible point of the LED circuit. If you left out the resistors before, the transistor also may be defective.

Or the gpio is dead