Popped sound was came from a blown electrolytic capacitor and most likely in the power supply board. This board has now gone to incomplete circuit(dead) that's why the led light is not lit. If your handy with electronics, you may troubleshoot this board and look for shorted capacitor, open fusible resistor, shorted voltage regulator IC, open fuse. If you can't troubleshoot it yourself, another option is to replace the entire power supply board
for more convenient. No soldering required, just pull-out all the cables connected from the existing board and put in the new board.
Also, check if your unit is under warranty/extended warranty period, avail it because the manufacturer will fix it for free. Don't attempt to open the back cover because it will void the warranty.
Let me know if you need further assistance.
Hope I helped you.
Have a nice day!
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