Question about Vizio VW42LF 42 in. LCD HDTV

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I have a Vizio VW42LFHDTV10A. I have sound, can change the channels but cannot see any picture. When I shine a high intensity light at an angle about 1 inch from the screen in a totally dark room, I can sometimes see a faint image if the image is black lettering on a white background. Otherwise, I can't see anything. Looking at the back of the set, I can see a blue light flash on and then off when the power is turned on. I haven't checked anything else at this point.

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It can be the 24vdc power supply for the backlights is bad, may be due to bad caps), or bad backlights inverter boards due to shorted circuits. You need more in-depth troubleshooting.
You can see if they have the pictures of the boards here: www.shopjimmy.com
Please read my guides for more understanding:
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
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 Mar 23, 2011

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http://electronicshelponline.blogspot.com/
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