There's about a 90% chance you're going to need new inverters. Your TV has 2... master and slave. The inverters are, essentially, the power supplies for the CCFLs in the backlight panel. If they fail, the CCFLs don't get the proper voltage and can't illuminate. The master is part number 19.26006.414, slave is 19.26006.413 and they'll run you about $50 each from moduslinkptstvboards.com (they rebuilt/recondition then resell).
Now, there's a slight chance you have a faulty main power supply (4%) or that the CCFLs themselves have failed (1%)... but both of these would be much more rare. If you have a voltmeter handy, check to see if you have 24VDC leaving the main power board and going into the inverters. If you do, the power supply is fine and will be removed from this list.
Please click ACCEPT
(even if you're a trial or subscription member) if you are 100% satisfied with my answer and plan on leaving me positive feedback
(your acceptance is the only way I get paid for my work). A bonus would also be appreciated!
I'm sorry if my answer wasn't what you wanted to hear, but it reflects the most honest and accurate information available. I hope you take that into account when deciding whether or not to accept and leave positive feedback.
That said, if you aren't fully
satisfied please do not
accept my answer. Instead, let me know what else I can do for you!
Finally, please know that accepting my answer does not
mean our dialog is over... you can still post follow-up questions or comments afterward.