The CCFLs are not lighting up at any moment, when the fault occoured the lamps shut down and only sound still played, there's image on the screen, with a flashlight I tried turning energy saving off, no change, PWM_DIM signal is 0.2V, I isolated the pin and soldered a 3.3V regulator at it but it still does not work.
All the main voltages 24V/5V/12V are ok, the mainboard is not sending enough PWM_DIM signal voltage.
1~5 - 24V - 25.01V
6~10 - GND
11 - BRI - 1.54V
12 - INV_ON/OFF - 5V
13 - PWM_DIM - 3.3V (with an AZ1084 3.3V regulator)
14 - ERROR - 0.04V
The only signal left to manipulate would be BRI, but I do not know what voltage it's supposed to be.
Disconnecting the ERROR pin does nothing.
That floating IC next to the inverter cable is the 3.3V reg, currently disabled(no Vin).
All the main voltages 24V/5V/12V are ok, the mainboard is not sending enough PWM_DIM signal voltage.
1~5 - 24V - 25.01V
6~10 - GND
11 - BRI - 1.54V
12 - INV_ON/OFF - 5V
13 - PWM_DIM - 3.3V (with an AZ1084 3.3V regulator)
14 - ERROR - 0.04V
The only signal left to manipulate would be BRI, but I do not know what voltage it's supposed to be.
Disconnecting the ERROR pin does nothing.
That floating IC next to the inverter cable is the 3.3V reg, currently disabled(no Vin).
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