32LV713B sound but no picture

[mali67]

Hi, i have a Toshiba  32LV713B, it has sound but no picture, there is a picture if i shine a torch at an angle on the screen.
Ive checked the voltages and all seem to be correct.
Ive changed the inverter board for another it made no difference, convinced it was still the inverter i had another sent out from the same guy. he assures me they were tested and working.

Am i missing something or is it looking like the backlights them selfs?

Any help would be appreciated , thanks

[jordan]

 

[mali67]

thanks for the manual, but all voltages are fine

[mulja]

Hi
did you have "power on" voltage to inverter and "dim" voltage
did you have no backlight or no picture?

[mali67]

Hi, thanks for your reply.
i have on voltage of 3.4v
and dim voltage of 0v
hope that helps

[mali67]

i have picture
no backlight

[mali67]

any ideas as to why i have 0v on the dim side?
i have tried tracing the dim section on the board, but not making much sense of it.

[mali67]

Im still stuck with this one. if any ideas

[Keith]

Is there any output from the inverter transformers?

Keith

[mali67]

i cant say keith as my meter isnt good enough to test.

[mali67]

just to add i have checked both primary and secondary windings of the transformers and both seem to check out ok

[jagbogah]

Hi, i believe dim voltage is produce by Q104 through R112.
DIM -- Max = 3.2v.
g/lock

[mali67]

i have no voltage to Q104 or R112

[Ohm Supplies]

Hello,

I think your neon will do to test for voltage.

is the inverter VIT71884.00?

Regards
Andy

[jordan]

Look on scheme of Digital Power DVDD 3V3  voltage regulator U-104 and C-117(470uF/10V) ... ...U-104  entrance 5V SW exit 3,3V that waters Q-104 or R-112
My bee need only resolder tis metal (Vout 3,3V)on power regulator U-104