My first suggestion is reboot the Flipper. hold the back button and left. This will not cause you to lose data.
did not help solve the problem =(
Most likely hardware issue like short circuit, problem with resistors or even something like IR LEDs or radio stack allways turned on, etc … try to contact support ?
Try for example to film flipper with a camera and see if the IR leds are on, if you have SDR try to see if flipper is sending radio signals, etc … more investigation would be required.
Also try the battery sollution, remove the connector and plug it again ?
But wait for a reply from support first as messing with hardware might void the warranty.