http://www.eserviceinfo.com/downloadsm/25749/RCA_24F512T.html
down load the schematic diagram &get the value.
hope this will help you.
this is only due to loose contact in power supply or there is a print intermittent in power supply.
as tv is on so no possibility of any parts failure.
if you are not tech person take the help of tech person.
good luck.
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