HP N7710 User Guide - Page 34

Chapter 7 The scan is completely black or completely white The item might not be placed correctly in the document feeder. Make sure that the item you are trying to scan is placed face down. Scanned images are not straight Verify that the document feeder guides are centered on the scanner and set to an appropriate width for the original being scanned. Make sure the paper guides touch the edges of the original. Vertical white stripes appear on the printed page The destination printer might be out of toner or ink. Scan a different original to the same printer to see if the issue lies with the printer. If the second original has the same problem, clean the scanner glass as described in the Care and maintenance section. Scan files are too large If the saved scan files are very large, try the following: • Verify the scan resolution setting. Resolution of 300 dpi is sufficient for creating editable text. Scanning at a higher resolution creates a larger file with no additional benefit. • Color scans create larger files than do black and white scans. • If you are scanning a large number of pages at one time, consider scanning fewer pages at a time to create more, smaller files. • Use the Kofax VirtualReScan software to reduce the background "noise" in a document scan to create a smaller file. Scanner buttons are not working correctly • Buttons do not work • An unexpected program opens when a button is pressed • Wrong HP Smart Document Scan Software profile is used when a button is pressed Buttons do not work After each step, press a button to see if it is working correctly. If the problem persists, proceed with the next step. 1. The buttons might be disabled in the HP scanning software. Verify the Disable front panel buttons setting in the HP Scanner Tools Utility. 2. A cable might be loose. Ensure that the USB cable and the power supply are securely connected. 3. Turn off the scanner, wait 30 seconds, and then turn the scanner back on. 32 Troubleshooting