Vizio m50-c1 has no picture but has both sound and backlights.

Vizio m50-c1 has no picture but has both sound and backlights.

Vizio has no picture at all. Vizio logo does not light up when turning on tv. Unable to see menu screen with flashlight test. Have replaced both the Tcon and main board but no change. Still no video at all. Any ideas? Thank you

ANSWERS:

If tcon ribbon cable removed and one side works, then search online for scotch tape fix on tcon board and video will explain how to fix the issue.