You can start by looking to see if the CTRL key is physically pressed. If you didn’t know, if you press any of the CTRL keys and scroll upwards or downwards, the mouse’s scroll will produce zooming.

Place the scroll wheel (and the circuit board, if necessary) back into the mouse.Īs it turns out, one of the most common causes that will trigger this kind of behavior is a stuck CTRL-key.

Remove any debris you find trapped in the tray.

Use your forefinger and thumb to lift the scroll wheel from its tray.

Usually, repairing a scroll wheel is relatively easy. Once clicked, one of the three scrolling cursor icons (shown to the right) are shown, depending on the program you’re using. To use auto-scrolling, click the scroll wheel by pushing in on the wheel on a blank or empty portion of the screen. If a laptop uses two keys as one key, you must press the Fn key with the second key you want to use. Where is the Scroll Lock key on a laptop keyboard? The Scroll Lock key on a laptop is often a secondary function of another key, located near the Backspace key.

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