Question about ViewSonic VX1935wm LCD Monitor

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Blacks out after two seconds of display,

Viewsonic monitor, vx1935wm, quit producing a picture, it will show for 2 seconds when the power is turned of then blacks out.

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It's seems you got a busted backlight inverter. Need to replaced a new inverter...

Posted on Feb 23, 2009

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I had the same problem with my vx2235wm. the symptoms were it would power on with no signal and the blus light would glow. when the PC was turned on it would kick back to the "power-save" state and the desktop would disappear.

To fix this you need to take the case apart (3 screws, one is behind the stand, then gently pry it apart starting at the bottom with a flatscrew driver and pop each tab carefully every couple inches, along both sides and a final wiggle to free the top edge.)
Inside you will find a metal cover, to remove this undo the screws holding the power supply and display ports then unscrew the screws holding it on.
Take notes of where the wires going in are oriented and then you should be able to see two boards.
In this case the suspect part is the DAC which the power supply goes into. On the DAC there will be a part number. In my vx2235wm it was DAC-19M009. Buy the whole board online. Mine shipped for around $40 total. Wait 2 days for it to arrive and installation is pretty much reverse of removal.
My dead display is back in comission, hope this helps with yours.

Posted on Aug 24, 2009

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Check your board and you will most likely find "domed caps". The electrolitic capacitors are easily replaced with just a soldering iron. Make sure to replace with the same or higher voltage rating and get the polarity right.

Posted on Apr 01, 2010

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Normally when this type of problem happens, the first suspect would be the inverter board, then the filter capacitors and lastly the mainboard.
A defect in one of the lamps and faulty inverter IC may cause the display to shutdown as well. If the lamp is defective, it will send a feedback and cause it to stop producing output signal thus the display just shut off once you switch in ON.

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