You cannot get your Fujitsu ScanSnap S510 scanner to go online. You have a blue button with a white S in your system tray in Microsoft Windows operating system but it has a red circle and a red line through it. You have turned the power on and off on your Fujitsu ScanSnap S510 scanner, rebooted that computer, and nothing helps.
You can try connecting that Fujitsu scanner to a different universal serial bus port on your computer. It is recommended that you power off that computer first and then disconnect that Fujitsu scanner device from an existing universal serial bus port and plug it into a different universal serial bus port on your computer. Hopefully, when you power on that computer, Microsoft Windows eXPerience operating system will find that device again and it will work properly.
You can browse into Microsoft Windows operating system Device Manager by browsing into System Properties and then in a Hardware tab and make sure there is not any problems with that device driver for your Fujitsu ScanSnap S510 scanner. If there is a yellow exclamation point then you will need to install that scanner driver again. If there is a red x then you will need to enable that device again, by right clicking and selecting enable.
Once you are in Microsoft Windows operating system Device Manager and you see no problems with that device driver, you can try highlighting and deleting that scanner device by right clicking and selecting “delete”. There is a Scan for hardware changes icon in the Microsoft Windows operating system Device Manager window. If you click that icon the Microsoft Windows eXPerience operating system will scan and find that scanner again and will try to install a device driver again. You could also try to update that scanner driver from within Microsoft Windows operating system Device Manager instead.
Actually, trying to update that Fujitsu ScanSnap S510 scanner device driver or installing that scanner driver again might be the quickest way to fix your problem. These instructions and tips were written for a Fujitsu ScanSnap S510 scanner with Microsoft Windows eXPerience operating system installed. However, you could certainly use these instructions and tips to troubleshoot using a different Microsoft Windows operating system.