Question about Philips 47PFL7403D 47 in. LCD TV

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My 42" phillips will all of a sudden make a real loud static sound. The only way to get it to stop is to turn it off for about 15 seconds and then turn it back on. Real nuicance, can it be fixed?

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It can be the unstable power supply, bad sound processor or power amplifirers problem, you will have to open it up and check the inside starting at the DC outputs of the power supply module first, you may have to replace the main board since it contains, the video processor, tuner, audio, T-CON driver.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Posted on Oct 02, 2010

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I have a 42 inch Hitachi plasma tv that is making a very loud static noice coming from the internal speakers. It stays at a contstant very loud volume unless I completly mute the tv or turn the volum


Based on what you have tried if a buzz or loud static via the speakers you have something wrong in the audio output circuit of the set--problem here is that circuit may be part of the Main board that processes all signal---a look inside---following the speaker leads back would lead you to that board.

A simple thing to do to narrow it a little (you may have done this) is with sound all the way off put your ear to the internal speaker--hear anything at all like a deep hum?

Depending on age of set and cost of the board likely bad it may or may not be a do it yourself repair.

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