Question about LG 26LC2D 26 in. LCD Television

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Green light comes on but no picture nor sound

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Right now the 5vdc standby power supply is working but not the 12vdc (for sound) and the 24vdc (for the backlights). This can be due to bad 12v/24vdc power supply sections due to bad caps with leakung/bulging tops or failed circuits, or it is not getting the PSON command from the main board, or the backlights inverter board is shorted out so it causes the 12/24vdc to stay in shutdown mode (you will have to disconnect the cabels to the inverter board to see if the 12/24vdc will come back on, you will get sound but no pictures).
Please read my guide to get more understanding about LCD TV.
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: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: 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.
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 Dec 31, 2010

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