Question about Soyo DYLT032D 32 in. LCD Television

2 Answers

The screen remains black after I turn it on.. I have volume but no picture.

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2 Answers

Bud Martin

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  • Master
  • 11,361 Answers

Please try this to narrow down the cause of the problem:
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: www.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.

Posted on Aug 25, 2011

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Chi Chu

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  • Soyo Master
  • 8,457 Answers

Turn tv on now?The tv picture does it flashes few sec. than dies have black tv screen panel have tv audio left only.Yes,than those tv boards called LCD inverter boards are dead.Tv have one or two long LCD inveter boards.These long LCD inveter boards only jobs are to provided a backlight for the tv LCD screen panel to produced a picture only.Tries websites like Shopjimmy.com,Ebay.com to buy those refurbish 1 or 2 long LCD inveter boards for the replacement.

Posted on Aug 23, 2011

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