Friends of myself I could help me I have a problem with this LCD, which does not turn on nor the STANBYD LED, so check the 5 volts of the stanbyd source and if you have them, I tried to turn on the source with a serial focus and a resistance between the pins of 5 volts and puh-on and if 12 and 24 volts are generated at the source. I reconnected the source to the mainboard and measured on the pins that go to the control buttons where there are 3.5 volts and when pressing the power button the voltage drops to 1.8 volts could help me by giving the guideline where to continue checking. Thanks in advance. Best regards.