Esp8266 light is always on and I can't install software

[rlrexyz]

My card was working properly and I connected it to a mosfet, one pin D4, the other pin to the gnd, and suddenly the blue light of the card started to turn on continuously, I turned the card on and off, the situation is still trying to install the same software, it gives the error "A fatal esptool.py error occurred timed out waiting for packet header" I couldn't find any solution!