...function) keys that you may have hit accidentally. Look at your keyboard for any keys that may look like they have something to do with the brightness which you would hit the fn key first then the ...
...alternative is hold down the FN button or your laptop keyboard and press the Fucntions key (look for the function key with the monitor icon) press and release it while holding the FN key until there ...
function key. (On my laptop you switch displays by hitting the Fn key and F8) - 2. If this doesn't work you may have a problem with the video card and might consider sending it to the manufacturer for
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