1. Please make sure the power code and USB cable(Don't use USB hub) be connected properly.
2. Install driver from CD or download from our website.The website download link attached as below.
Download the latest software from following Plustek website: OpticBook 3800L Support

Brazil
Latin
America
USA &
Canada
Australia
China
India
Indonesia
Japan
Korea
Taiwan
Vietnam
Austria
France
Germany
Italy
Netherlands
Other
Europe
Poland
Russia & CIS
Spain
Switzerland
United Kingdom
Saudi Arabia
Turkey
Israel