What would cause compaq computer screen to go black

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  1. Welcome to Tom's Hardware Forums,
    Without any other information (such as model and type of computer) I'm going to assume here that you are talking about a laptop.
    Two primary suspects for that behavior from a laptop are:
    1) Faulty Power Inverter for screen - you can check for this by shining a bright light at the screen and seeing if you can see a dim display - if there is a display, replacement of the screen or power inverter would be needed
    2) Faulty graphics processor - you can check for this by connecting to an external monitor
    If this is a desktop computer, please specify model number (which may be helpful in any case)
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