pictures comes on just few seconds it goes blank but I can still here

Pililan Msowoya let us know what the exact model of your TV is. Verify that you have no image on all inputs. 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 angle it against the screen with the TV at a station where you can hear the sound See if you can make out shadows or shapes. If you do, then it is your backlight that has failed. If you do not see anything, unplug your set and remove the back. then visually check the boards for any obvious damage like domed or leaking capacitors. Check all the wiring and unplug the wires and plug them back in to make sure they are properly seated. Post some images of all of your boards with your question. Use this guide 기존 질문에 이미지 추가하기 for that so we can see what you see.

It is possible that this is a power board, T-con board or backlight strips issues. It is most likely the backlight strips just based on the fact that this is a Hisense TV where it is common to use sub par standard LED strips (keeps the cost down and profits high)