Vizio E470VA - Backlight On But No Picture

[at1105]

Backlight works but no picture.

Below is a list of all the readings I have taken...


Power Board

Out to Inverter: 24v=Yes, On/Off=Yes
Out to Main Board: 24v=Yes, 12v=Yes, 5v=Yes, PS-ON= Yes
Large Filter Caps= ~Good~ reading was >360Vdc

Inverter Board
Backlight On: Yes
Fuse: ~Good~ measured 24v
In from Power Board: 24v=Yes, On/Off=Yes

Main Board
In from Power Board: 24v=Yes, 12v=Yes, 5v=Yes, PS-ON= Yes
Out to T-Con: 5v=yes

Voltage Regulators:

U103 (G9084)
Output tab = 0v
Pin 1 = 0v
Pin 2 = 0v
Pin 3 = 0v

U608 (17809 0501)
Output tab = 0v
Pin 1 = 0v
Pin 2 = 0v
Pin 3 = 0v

U704 (M171 1117-18)
Output tab = 1.80v
Pin 1 = 0v
Pin 2 = 1.8v
Pin 3 = 3.32v

U706 (M189 1117-33)
Output tab = 3.32v
Pin 1 = 0v
Pin 2 = 3.32v
Pin 4 = 5.12v

T-CON
In from Main Board: 5v = yes
Fuse: Good 5v on each side.

Voltage Regulators:

U4407 (G1084-18)
Output tab = 1.80v
Pin 1 = 0v
Pin 2 = 1.8v
Pin 3 = 3.28v

U4402 (G9084)
Output tab = 3.28v
Pin 1 = 2.04v
Pin 2 = 3.28v
Pin 3 = 5.06v

U4403 (G1117)
Output tab = 1.25v
Pin 1 = 0v
Pin 2 = 1.25v
Pin 3 = 3.28v

U7054 (1117-18)
Output tab = 0v
Pin 1 = 0v
Pin 2 = 0v
Pin 3 = 0.62v

[CapLeaker]

Re: Vizio E470VA - Backlight On But No Picture

why a new thread?

[at1105]

Re: Vizio E470VA - Backlight On But No Picture

why a new thread?

Didn't receive anymore responses after posting the latest measurements. I figured it had been pushed so far down the list by newer threads that it was probably getting hard to find resulting in no responses. Was hoping to keep it fresh because it seems we're close to finding the problem.