Unable to flash esp-12

Hello there. I am trying to flash the latest firmware v85 to flash an esp12 mcu. I am using esptool.py and following instructions provided on the website. Everytime the flashing finishes, the mcu restarts in a weird way with no led lighting and it consumes more power. when i try to connect there are weird letters and symbols and it says prompt not found. Any clue on how to fix this? i am using flash map for 4mb mcu. i have tried it using esptool, espflasher, nodemcu flash tool,etc. all same behaviour. any help is highly appreciated. thanks

Are you connecting at the correct baud rate?

The IDE defaults to 9600, but ESP8266 uses 115200...

I changed the power supply and it worked! also, yeah good tip about the baud rate, i kept forgetting to change it. Thx