The common failure symptoms. Main Board Failure (Most Likely). The “Fading Light” Symptom. When you plug the TV in, the white LED power indicator on the bottom left lights up, but then slowly fades out. The TV does not turn on. The Vizio “V” logo appears on the screen, but the TV freezes and never loads the picture. The TV turns on, shows the logo, shuts off, and repeats this cycle endlessly. The TV turns on, but no signal is detected from any HDMI port. The Smart TV interface is extremely sluggish or crashes entirely. PLEASE READ BEFORE PURCHASING. Delivering fast, reliable, and professional repairs. The board we receive must be in good physical condition. And must not have been tampered with or serviced. No apparent traces of previous repairs should show. We will reject service to boards that someone has attempted. Repairing and you will still be charged for.