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My friend has a 50inch philiphs tv the sound works but no image is there anything anyone could advised

50inch flat screen tv

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Is it a LCD type screen? If it is, look close, is there no backlight, or its lit with no image? If its no backlight, the screen backlight inverter is bad. If there's backlight with no image, can be the display, connection cable or mainboard.

Posted on Jan 11, 2013

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Posted on Jan 02, 2017

  • 298 Answers

SOURCE: No picture, sound works. Screen flickering

It sounds like the video output isn't
working its most likely a component
failure 1 thing you could try is connecting
a rca cables from video/audio out on the set to
another set vid/audio inputs to see if it the video gets
through.This is a problem that requires technical
knowledge and test equipment to trace the video
signeal

Posted on Nov 22, 2007

  • 3 Answers

SOURCE: No picture, sound works. Screen flickering

That problem is caused by the Y Sustainer board.

Posted on Apr 05, 2008

  • 2 Answers

SOURCE: Our cat knocked over our flat screen LCD tv The

The good news is that the TV is not broke and can be fixed. You will first need to check for any cracks on the front screen of the TV. If there are any cracks then you will need to replace the screen itself, which ranges from $100 for smaller sized TV's to $500 for larger sizes. You should probably call a local repair shop and ask them for a quote. If there are no cracks then the problem may be from within the TV. If this is the case, then you will need to figure out what part of the LCD is broken. It may be either the LED lights or CCDL's (cold cathode fluorescent lamps) that are broken. You should take it into a repair shop and let them fix it, because messing with the LED's or CCDL's is very dangerous and should only be done by a professional. The LED's should cost $100 tops to replace and the CCDL's should cost about the same. Hope this helps!

Posted on Jul 01, 2011

budmrtn
  • 11361 Answers

SOURCE: no picture, sound only on 50inch lg flat screen-3

It will require in-depth troubleshooting to narrow down to find out which board is bad. Are you going to do the repair yourself and have all the tools?
Please read below:

First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

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

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Parts: http://interliquidparts.com/

Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find

Posted on Oct 13, 2011

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