Arduino UNO R3 power issue

Hello, i'm new in electronics.
Today I was working in a 4 relay module conected to the arduino board, the board was connected to de USB port and relay module to the arduino power supply 5V. I don't know what happended but now the LED's "ON", "TX RX" are lightened in a lower level. Searching a solution, I connected the board to an alternative power supply and the LED's were lightened at normal levels, with high brightness. Unfortunately I discovered that the board was too hot and also the ATMEGA chip. Please help me.

Worst case is you need a new UNO
Best case is you need a new atmega328P controller chip

Pull the controller and measure the 5 volt pin with a DVM