Question about Philips Magnavox 15MF400T 15 in. LCD Television

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How do you repair the or check the Back lamp?

Hi Jerry,
I noticed that I have sound but no picture, but i do see a faint picture when I flash a light on the screen. So I was wondering how I would repair or replace the back plane lighting? Thanks for any help

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This is not something you should do yourself unless you are experienced at doing this type of service.

If you call the parts supplier for the manufacture of your set, you have to find out the part numbers for the backpane lamp and power supply for them.

Some sets use 2 sets of lamps and power supplies together, or a common supply for multiple lamps. This is model and design dependent.

In some models the lamps are not able to be replaced. They replace the complete screen assembly.

In some models of screens, the complete screen assembly must be taken apart like a wafer system. Taking the screen apart is not too bad. It is getting it back together, and having the lamps installed to not give shading errors.

You will most likely have to undo a number of ribbon cables. If the cables are heat sealed to the circuit board, they will have to be replaced, and re-sealed back on. If the ribbon cables are on connectors, then this will be easier.

My suggestion is to give the set to the Philips service rep to evaluate and replace the lamp system if it is feasible or able to be done. If they make an error or accidentally damage something, they will be responsible. When they do the work they should warranty their job.

Jerry G.

Posted on May 31, 2008


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