Raspberry Pi 3 reboot continuously but power supply is ok!!!

[4bit4u]

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 restarts automatically.
For this reason i changed the SD card, i changed the power supply and all of the other 5 works fine, i have no idea what happened to this one.
Any help will be helpful for me, thanks a lot.
Best wishes and merry Christmas.

[mahjongg]

perhaps it's poly fuse has been "blown", or rather halfway blown so that it exhibits some resistance.
it should restore itself if you leave that PI off for some days.
also try a different power cable, as it may have too much resistance too.

[4bit4u]

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 related to this problem?
Thanks

[MaxK1]

Is the SoC getting hot? (Too hot to hold your finger on)