My Sharp 60 Inch TV Model # LC-60LE600U will not power on. It will only start to power up and then shuts off before I get a picture.

copy and paste
https://www.justanswer.com/tv-repair/9gb1o-sharp-lc-60le810un-won-t-power-on-front-led-blinks-one-short.html

Power supply board is week google your model #and put power supply on end

I wish it was that easy!! It is either that or the LED lights behind the screen. The OEM pushes those to their limits in order to get the brightest picture. When ONE of them fails, the power board shuts down the unit.

if this tv is still under warranty i would be filling a claim straight away this is almost always wither a hardware or firmware fault both of which if stock should be covered under warranty.

good luck.

Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Sounds like corrupted firmware. A firmware update is necessary. Contact the authorized service center for Sharp.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/

On my older sharp non-smart TV there is a back/return butting on the remote.

I had the same problem and the power light was blinking a specific code (3 slow and 1 fast). I made a video on how I fixed it.

Click here to download the user manual to your TV. It has all details.