It could be defective lamps which are big project to find the right parts & replace
SOURCE: Philips 30pf9946d/37 Backlight Issue
In the service shop, they try the parts to verify.
Jerry G.
SOURCE: Replacing backlight inverter board
Not always but usually the inverter board is part of the display panel, way to much money to bother fixin.
SOURCE: my philips lcd tv has sound but no picture what is
change the backlight (cold cathode light) on your monitor.. If you are able to open the back of your lcd monitor carefully, the backlights are located at the upper and the lower part of the edge .. replace it with conventional cold cathode lights(protective tube was removed)... there are also instances that backlight was good but the ballast transformer is burnt. Replace the ballast. Its very cheap to replace that.
SOURCE: i need a replacement LCD panel for my Philips TV.
unless it's under extended or manufacturer warranty...not cost effective to replace. You can get it at partstore or shopjimmy.com if this is the case. Good success.....Meder's TV
SOURCE: received new backlight inverters 6632L-0348b and
I wouldn't unless you're sure they match the particular model. Each of them are different depending on size of set. This can be verified by seial number version(ya1b, ya3b, c and so on). If you were to try this you might fry the backlight, requiring a replacement panel. They supply different voltages........Please be careful, can be lethal, 1000vdc or more........Good success, Meder's Tv
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