My TCL 43" Digital TV is Constantly Switching off but producing sound

I have been using my 43 inch TCL Digital TV for for 1.5 years now. The model, to be specific is 43S6201. For a few days now, the TV has been constantly switching off every few minutes but continues to produce sound. Only the visual disappears. This can sometimes happen every 2-3 minutes, sometime 10-15 minutes. When i switch it off and back on, everything comes back normal only for the cycle to repeat shortly. At first i thought it was a setting problem and reset the TV to factory settings but this didn’t help in any way. How can i solve this problem?