If it remains dark, unplug it and push the power button for about one minute, then plug it back in. See if that resets your TV. If it remains dark, use a flashlight and in a darkened room, angle the light beam against the screen with the TV at a channel where you can hear sounds. See if you can make out shadows or shapes. TCL LED Strips Replacement Tutorial - 65" TVCLICK HERE for Replacement LED Strips: https://www.shopjimmy.com/tcl-006-p1k3507b-replacement-led-backlight-stri Step 1: Ensure that the TV and channel box is ON. Step 2: Disconnect the channel box cable from the TV. Step 3: Unplug the channel box power cord from the outlet. Step 4: Wait for 30 to 60 seconds. Step 5: Replug and power ON the channel box. After this, make sure to set up your channel box to your TV again. Can get refurbished boards pretty cheap. Replacing boards for backlight issues is like replacing a lamp when the light bulb is burnt out and wondering why the new lamp isn't working with the old bulb. Most likely a loose connection somewhere in the backlight assembly that is (for now) making contact again. Backlight Not Working in Hisense TV. The most likely hardware problem with your Hisense TV is the LED backlight. Due to this, your TV screen looks black, but its sound is heard, and the LED light of Hisense TV also works properly. A shot at the mainboard or power board circuitry renders the LED backlight unusable. ScuqFeE.

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