Question about Philips Magnavox 20MT133S 20" TV

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Philips wide screen 32in Digital TV

My tv when switched on, no pictures but light-blue screen appears with white lines running accross the screen from top to bottom. There is sound though.I can listen to the TV like a radio. It started a few weeks ago with the pictures being cloudy and light-blueish. A few days ago i could switch it off and on then the coulor would return but it would keep turning 'cloudy'for a few minutes the ok for another half hour or so Any one have idea of what is going on? thanks

Posted by Edward Alli on

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1 Answer

Simpson Neal

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You probably have a component breaking down on one of the circuit boards. It would have to be checked out to find out which one. Stargazer

Posted on Feb 17, 2007

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No picture, no menu, black screen, no raster, sound ok

From your detailed description, it sounds that the main chroma processor IC has damaged. Raster means nothing, but the lighted screen that appears, when a TV is switched ON. For some brands, there will be a blue screen; when there is no signal input, and some others will have a bright white screen with some snow.
I advice you to contact any service technician, to get this TV repaired. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".
http://electronicshelponline.blogspot.com/
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TV BLACK SCREEN WITH THE POWER ON.

It needs repair.
If the line is vertical, then something is damaged on its horizontal circuit section on the mainboard.
If the line is horizontal, the vertical circuit section is damaged.
have it repaired to a qualified service center or person!
avoid switching it to avoid further damage on other parts!
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This can be caused by the contrast being set too high. Typically, for a Sky box the TV's contrast should be set to around 65.

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THI IS THE INTERNAL CIRCUTRY FAULT BEST YOU
call the service person and dont try to open it other than in side of TV SET HAVING Hazard of electrical shock be handle most care fully .
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A repair like this is in the vertical drive/output section of the TV set. It could be a simple capacitor causeing this problem or a combination of the capacitor and the output IC. A repair like this should not exceed 120 to 150 US. Is it worth that to you? How much can you replace it for? Good Luck PS please dont forget to rate this thread.
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