'Morning,
I get sound and picture when powering on the TV and its stays that EXCEPT that the left half of the screen will dim every few seconds then return to normal while the right side of the screen performs as designed.
Did the soft and hard reset options pulling the plug, using the reet option in the vizio menu to no avail.
I checked the mainboard - found some popped capacitors so replaced it - but that did not change the situation.
I checked the t-con board. It is getting good power. Then I removed one ribbon cable to see if I could isolate the problem, then the other - no impact - same situation - all backlights were lit but the left half backlights dimmed (remaining lit) then brightened and the process continued.
The power supply board was next. The backlights are powered off this board. Checked the voltage on the connector going to the left half backlights and on two of the pins got voltage readings that read 93+ volts and then 105+ volts, rhythmic pulse voltages while the other pins reported steady voltage readings.
Not sure where to check next. Have not jumped to taking the panels off and actually testing backlight strips - we all know that is tedious and a little tricky.
Should I jump to that or is there something I should be check that I overlooked?
Thank you for any insights.
Brian
I get sound and picture when powering on the TV and its stays that EXCEPT that the left half of the screen will dim every few seconds then return to normal while the right side of the screen performs as designed.
Did the soft and hard reset options pulling the plug, using the reet option in the vizio menu to no avail.
I checked the mainboard - found some popped capacitors so replaced it - but that did not change the situation.
I checked the t-con board. It is getting good power. Then I removed one ribbon cable to see if I could isolate the problem, then the other - no impact - same situation - all backlights were lit but the left half backlights dimmed (remaining lit) then brightened and the process continued.
The power supply board was next. The backlights are powered off this board. Checked the voltage on the connector going to the left half backlights and on two of the pins got voltage readings that read 93+ volts and then 105+ volts, rhythmic pulse voltages while the other pins reported steady voltage readings.
Not sure where to check next. Have not jumped to taking the panels off and actually testing backlight strips - we all know that is tedious and a little tricky.
Should I jump to that or is there something I should be check that I overlooked?
Thank you for any insights.
Brian
Comment