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回答“after a loud bang, screen stopped working”I had this happen to me on a cheaper computer monitor. when you get the board visible look for a blown capacitor. these are the vertical cylinders on the board that are around the same diameter as a dime but could be smaller or larger the tops of them should all be flat. if a capacitor is blown it will have a domed shaped top. Might have to check with your local electronics store but most likely just need that capacitor replaced once I was successful replacing the one on my monitors video board it has worked great for the past 2 years with no issues!