How to Fix Hisense TV has no picture but only sound LED TV no picture Troubleshooting

Sound from Hisense TV but no picture and BACKLIGHT FAILURE.
In a dark room, take a flashlight and, from an angle, shine it on the screen and (TV troubleshooting, no picture) see if you can see any movement. If you can see movement or see your menu, then its backlight is failing. If the screen is completely black with sound then its T-Con card

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