NEED HELP

Laddie
 

Thank you to all that helped with prior problems.
I have the nextion 3.5 working fine. 
I do not know what I did BUT now I have no receive. When tuning I hear faint notching with dial turn matching the freq change.
I get a hum but no signal. The voltage regulator which has no heat sink on the  Raduino is getting very hot to the touch.
Any help would be greatly appreciated.

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