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Please check all the connection properly once again..
Just hold the power on button into press mode for some times while power is given..
Just try to reset the unit by switching the unit till 5-10 minute and then again connect cord and give power.
If all not satisfied then It seems that there is some device got damaged..and need to be changed….
And its not necessary that every time you find burnt smell of damaged electronic parts..
Best of luck..
Hope it will help you ..if not let me know…