Thank you mahjongg, i removed the Fuse but i still have problem, i used the same cable to power another Pi and it was ok with the other Pi. I used the USB cable to boot and this time there is no Under voltage sign but raspberry still restart at the same rainbow screen. Any other idea which maybe rel...

Hey, I have 6 raspberry pi3, and 5 of them are OK, i checked them and used them with the same power supply, but one of them which was working before is now restarts continuously. The under voltage sign is up there (https://postimg.org/image/b062013wb/) and as soon as it reaches to rainbow screen it ...