Need flast screen schematics or tutorial

I've asked this question before.
I have a Envision flat screen monitor with a (very) dim screen - it starts normal and quickly vanishes.
A basic understanding may help me to repair this or schematics of this or another brand will help.
Any assistance will be appreciated.
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Steve wrote:

Model number?
The most probable cause of this is that the backlight lamp(s) and/or power supply are failing.
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Paul Hovnanian mailto: snipped-for-privacy@Hovnanian.com
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Model number is: TFT1780PS
Thanks
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Steve wrote:

sci.electronics.repair might be a better newsgroup for this.
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