Vizio VW42L HDTV10A, Black screen name display on no sound nothing,VIZIO tech says suapects backlight bulbs, but why wouldn
No picture no sound , Name display lights up. Vizio tech suspects backlight bulbs, but why doesn
Televison & Video
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Answers & Comments
If the backlights lamps are bad, you will not get picture but will still have sound. Lamps (est. life of 50k hours) are rarely goes out, its electronics that go out first. I do not think the person you talk too ever work on the LCD TV.
More liekly that the 12v (for sound) and the 24vdc (for backlights) power supply section is not working.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Basic troubleshooting guide here:
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, long life rating such as PANASONIC FM or FC series.
2.6v is too low, it should be about 3.3v and higher. You need to diconnect that pin from the power supply to see if it gets higher, the PS_ON may be loaded down too much by the PS_ON input circuits on the power supply board.
I Measured the PSON voltage again it is barely over 3 and cutting the wire and measured before the power supply it is same. Thanks for your help!!