My 19" Acer LCD monitor went dark, the Instructables site showed me How to repair a Westinghouse L1975NW 19" LCD Monitor (equivalent to mine) using less than 10 dollars worth of parts found on eBay. Soldering skills required. Changed two capacitors, 2 transistors, and a tiny fuse.
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LifeHacker is similar, and more on the geek side of things.