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What causes Viewsonic VX910 to go to black screen one second after power ON?


Answers :

Depends of front LED behavior: if it turns off as well then power supply gets overloaded, if it stays on then inverter turns into protecting mode.
In first case check for suspicious looking electrolytic capacitors over power supply module.
In second case you may need to check backlight lamps, driver MOSFETs in the inverter (if PCB around and under them is darkened, better replace them). More unusual problem is faulty high-voltage capacitors in secondaries of pulse transformers, or damaged insulation of high-voltage wires from inverter to lamps.
Please ask if you need you need more specific info about MOSFETs or lamps replacement.
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