Question about ViewSonic VA712 17" LCD Monitor
Here is the service manual: http://ftpkuban.com/FTP/Manual/ViewSonic/va712-2_sm.pdf
You need to verify that you do have steady 5vdc and 12vdc first, the problem can be due to bad caps, failed transistors/IC or inverter transformers, or worst cas the lamp assemblies.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
Posted on Sep 16, 2010
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Posted on Jan 02, 2017
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