Unplug it for about an hour to let it reset itself, if it is still bad, you will need to check out the power supply module DC filter caps and output voltages.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=Vizio+VU37L+
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
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