Recent content by Cuddlyfriction

I have a toshiba 50L711U18 my problem is after about 30 seconds my backlights turn off I have done the flashlight test and I can still see the menu and hear sound ... turning the blacklight down in the menu increases the amount of time before the backlight turns off My next question would be is...

What may be causing this? Default settings tv shuts off after about 30 seconds but still outputs sound... if I turn the backlight down in options the tv might last 5 extra minutes but still turns off still outputting sound Edit: already opened tv brushed air vents and vacuumed inside