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Viewsonic VP191 possible Main or Inverter board fault need help fixing


Active Member
Hi All

I am attempting to fix my viewsonic VP191 LCD monitor.

what happen?
The screen start to flicker randomly(like dimming the brightness). It is still power on and no dead pixel. It is like the voltage is drop slightly and come back to the full.

Possible fault

After researching it might due to the inverter or the main board. Power supplied look fine for me...
Possible fix

If some of the component are defect, replacing the component might do the job.

Need help
- identify which component is fail... there are few thing i hightlight that might be defect... please let me know if i am wrong or right

- if anyone know i can obtain the replace board please also let me know..


  • vp191 1.jpg
    vp191 1.jpg
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  • vp191 psu.jpg
    vp191 psu.jpg
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