How to fix Promethean Teacher ActivPen 4T3-2-BK Stylus for 100/300/300pro Series ActivBoards
I found an easy way to fix this Promethean pen
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![Slipknot - Unsainted [OFFICIAL VIDEO]](https://sun9-72.userapi.com/Az6z0pvF03kO386tgnv6OmV8maZlGdaH24OI6A/BpTYUWgQXYs.jpg)
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