Facing TV Problems? Ask a TV Technician.
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Were you able to get the set to respond?
If you're still having the same problem, then unfortunately this indicates the set's Mainboard has failed and needs to be replaced. This is a "plug and play" part- meaning no soldering or special tools are needed to replace it. Only a screwdriver and about a half hour of your time. That part generally can be purchased for your set at the link below for $105 (but is currently showing as out of stock):
Alternatively, if you're not comfortable with this type of work, then at a shop this is $300 parts and labor, which may or may not be cost effective as a brand new 50-55" LED Smart TV starts at around the same cost. However if you'd like to inquire on repairs, or seek a 2nd opinion, you can use the link below to locate a shop in your area if you'd like:
Other than that, I'm sorry for the bad news and wish there were a quick fix.
Let me know if you need more help. Also, could you please click a POSITIVE RATING (3-5 stars at the top of the page) and click SUBMIT so that I am credited for working with you today?
Do you need further assistance?
Doubtful, I wouldn't have given you the diagnosis I gave if it were likely a power cord was the problem. Try plugging the Sharp directly into the wall- I don't see the results being any different, but give it a shot.
Did you have any luck?
I was just following up to see if you needed further help? The site shows that since the question is open that you are still looking for help. Or, if you received the information you were looking for-could you please kindly rate my service POSITIVELY (by clicking a 3-5 star rating by scrolling to the top of the page)? Thanks in advance.