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. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
SOURCE: I have a Sanyo LCD-32CA9S. Turns off after 10 minutes
Tru using your remote to access the factory reset mode to default. It might be hard to find, but it should be listed in your tools or settings options somewhere. Also, you can unplug the set for 5 minutes and then plug it in again. This resets the computer in several models. It's like a hard reboot.
SOURCE: My 32in sanyo LCD tv stop showing picture after i
Sanyo is cheaply made TV, but then again, most LCD TV last about 2~3 years before breaking down.
You need to check out the power supply and the inverter board.
Please see my basic troubleshooting guide:
http://s807.photobucket.com/home/budm/allalbums
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: try www.shopjimmy.com or Ebay
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