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There should be an alternative compatible power cable for your TV, such as the cable to your home PC computer, if you desperately need to use it of course. Or for replacement Just go to any electronic store and ask them if they have the power cable for the model of your TV.
Write down your TV model and ask them if they have the cable for it, if they dont just ask them for an alternative cable which " Will " with your specific model.
This is a classic sound of a switchmode power supply capacitor "popping" this symptom may have many, many causes. It would be best to get a "Quote" for repair. That way you can tell, if you wish to repair or replace.
Go to your local shop of electronic parts and ask if they have a remote control for your Proscan PS27123 TV. If they haven't, ask for universal remote control (or go to another shop). Of course it's the expensive way of the problem solution, but it's worth it.
just to be sure, is it vertical or horizontal? Anyway, if it is vertical, it could point out to the vertical Ic section or some loose contacts along the lines. If it is horizontal, it could be a filter capacitor along the horizontal Circuitry. Mark the high voltage capacitors along the high voltage sections.