HP ScanJet Pro 4500 fn1 - Manual (Page 57)

3. Restart the computer.
4. If the problem still persists, there may be a problem with the touch panel. Contact HP Support at
www.hp.com/support .
Touch screen display issues
The touch panel is having display issues or scanner buttons are not working as expected
The following symptoms indicate a problem with the scanner front panel.
● Touch panel issues: The display is blank, or part of the display content is missing.
● Button issues: Buttons are unresponsive, or the wrong action occurs when you press a button (for
example, you get a single-sided scan when you press the Scan Duplex button.
If the scanner exhibits any of these problems, contact HP support at www.hp.com/support .
Scanning performance issues
Scanner does not scan immediately
Make sure the document feeder hatch is closed, and that the scanner is turned on.
Scanner is scanning items very slowly
When scanning to edit text, the optical character recognition (OCR) causes the scanner to scan more slowly,
which is normal. Wait for the item to scan.
NOTE: Windows: For the best OCR results, scanner compression should be set to the minimum
compression level or be disabled.
Scanning at a higher resolution than necessary increases scanning time and creates a larger file with no
additional benefit. If you are scanning at a high resolution, set the resolution to a lower level to increase
scanning speed.
Scanner scans only one side of a two-sided page
Verify that the selected scan shortcut specifies two-sided scanning.
Scanned pages are missing at the scan destination
When scanning, pages that stick together are scanned as one item. Check to confirm that scanned pages are
not stuck together.
Scanned pages are out of order at the scan destination
● Verify that the page order of the original document is correct before placing the document face up into
the document feeder.
● Make sure that there are no staples, paper clips, or any other attached material (such as adhesive
notes) that may cause the pages to feed incorrectly.
● Verify that pages are not stuck together.
ENWW Scanner operation problems 49