Across the top 20% the picture looks normal. The bottom 80% goes from a normal to picture to gradually very dark. You can see the picture, but sometimes just barely.
I assume you mean BAD power board...the power supply is the only board that wouldn't case your issue..chances are you have some bad LED's in the panel, in time the set will get to where it won't come on at all, you can take it apart and find the bad lamps and replace those strips if your somewhat mechanically inclined, be really careful handling the panel as if its broke then all is lost
SOURCE: I have a Vizio VW46LFHDTV10A - the problem is the
It can be main board, T-CON, or LCD panel. I would try reseating the ribbon cables between the T-CON and the LCD panel first.Unless you have service manual and scope to look at the signals it will be difficult to be 100% for sure as to which board is bad, the repair guy will more likely to do board swapping, starting with the T-CON board.
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
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.
Please post back what you fin
SOURCE: Vizio VW46L10 TV has a 6 inch dark band across the top of the picture.
Change input device to some other like a DVD player.
Switch off TV, switch off power, remove plug and wait for 48 hours and retry. If problem persists, call in a qualified service technician.
SOURCE: Model e550i-b2. Backlight comes on but why no picture?
T'Con board fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
If you wish to get assistance over phone, visit this site. https://www.6ya.com/
Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
hi the led in the panel may have shorted out thanks
shaun
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