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Repair guides and support for your Philips TV.

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philips 40pfl3705D/F7 no sound no video

No sound or video, but backlite is on

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Hi @mjackerman ,

Does this occur on all input types?

Do the menu screens work?

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Yes, occurs on all inputs.

Menu screen does not work.

I removed the back cover and checked power supply voltages and all appear to be normal.

Backlite does come on.

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Hi @mjackerman ,

It’s looking like a mainboard problem.

Here’s a link to the service manual (I think).

It has troubleshooting flowcharts, which may be of some help

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The link does not work, is there another link to try?

Thanks for your help.

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Hi @mjackerman ,

I have no trouble with the link using Chrome, Firefox or Edge broswers

Here's the link in full

https://www.manualslib.com/manual/102435...

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Mark Ackerman 将永远感激不已
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