Question about Philips Magnavox 27MS343S 27" TV

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Lcd tv no back light on screen

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Failed backplane power supply, and or failed lamps are the most common cause.

Jerry G.

Posted on Apr 16, 2008

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That is an LCD television. The only thing that needs to come on in the form that you are talking about is the back light.. These are tube lights that are behind the screen off to the sides of the lcd. They are controlled by a device called the inverter. So the problem sounds like the back light is bad especially if the picture has a yellow or orange tint to it.

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hope I dont sound too crude, but have you checked the contrast and brightness controlls ?? they may be labled as 'picture options' or some other odd label...

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if you felt confident enough you can open the tv up (if its under warrenty do not touch it and get it fixed by the supplier)
if its an lcd tv, check to see if the backlight comes on when you turn the tv on, to do this, (better in the dark) turn the tv on at night, if the screen lights up but no picture, it could be the motherboard. if it doesnt light up then its for sure your screen.lcd tvs have a history of these faults, replacements though are not cheap. if you can fix it yourself, do so.

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Take a strong flashlight when the set is on and shine the light into the screen see is you have a picture as it may be the backlight. If the screen lights with no picture its a pcb board problem. Please verify your model number and I will try and assist you.

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If these are oth LCD projection have them looked at. The light engine will need to be relaced and has an extended warranty on some models for this case. Call Sony with the serial and model to verify and they can tell you in your area who is a qualified Sony servicer. Circuit City can handle these if they are covered by the light engine warranty.

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