If your scanner is not detecting your documents, there are several potential causes and resolutions you can try to get it working properly.
The most common cause of a scanner not detecting documents is an issue with the connection between the scanner and your computer. This might be caused by a poor USB connection, so it’s worth checking that your cable is firmly plugged into both the scanning device and your computer. If this doesn’t solve your problem, then you might want to try using a different USB cable, or even a different computer if available.
If the connection between the scanner and computer appears to be working, then the issue may be related to the settings in your scanning program or the scanning engine itself. To investigate this, you should check the configuration of your scanning software. In particular, you should look at the settings for paper size, resolution, color depth, and other scanning parameters. You can also check the manufacturer’s website for any available firmware updates for the scanner model.
If the scanning software is configured correctly and no driver updates are available, then there might be an issue with the physical components of the scanner itself. Check the documentation for the model of scanner you are using, as this will tell you how to open the device and check the rollers and feed mechanism. In some cases, dirt or dust can accumulate on the rollers, which prevents the scanner from properly detecting documents and sheets of paper. Once the scanner is opened, examine all the rollers and gently clean them with a dry lint-free cloth and compressed air canister.
If none of the above solutions worked, then the issue could be related to the document itself. Sometimes, a scanner may not detect documents that are wrinkled, torn, folded, or otherwise damaged. If this is the case, then try replacing the document with a new one and rescanning it.
Finally, if all else fails, consider taking your scanner to a professional service center for assistance. An experienced technician should be able to diagnose any hardware or software issues and get your device back to working order in no time.