Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default Envision Flat panel

I'm still not sure what to measure for voltages in this flat panel monitor
that goes dim about 2 seconds after I power it up. It's so dim, you need to
look at it very close in the dark to see a faint picture.


Does anyone have any schematics, have any experience with this model, or
can lead me to a site that may have some tips?

Thanks in advance
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Default Envision Flat panel


Peter:
It sounds like your back-light is going off. Probably the inverter is
bad.
Hold a NE2 (Neon gas) bulb near the transformer on the inverter board.
The gas will glow if the transformer is working and generating the 900
to
1200 volts AC needed by the back-light bulbs.
Check for bad electrolytic capacitors on the inverter. Also check the
capacitor (if there is one) at the primary of the transformer.
Hope this helps...
John

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