HP scanjet 7400c User Manual

Performing basic troubleshooting 

Performing basic troubleshooting 

Performing basic troubleshooting 

Performing basic troubleshooting 

If the scanner or software is not working, perform these steps first.

●

Check that the power cable is securely connected between the scanner and a 
live electrical outlet or surge protector that is turned on.

●

Make sure you have properly and securely connected the scanner to the 
computer using either the Universal Serial Bus (USB) or the SCSI Input/Output 
(I/O) interface. See 

●

If the scanner is making a loud grinding noise, make sure the scanner is 
unlocked. Move the lock down to the unlocked position. 

●

Disconnect the power cable from the scanner and turn off the computer. After 
30 seconds, reconnect the power cable and then turn on the computer, in that 
order.

●

If you receive installation file errors or the scanning software will not run, make 
sure all programs are closed, and then uninstall and reinstall the scanning 
software.

●

Make sure your computer meets the minimum system requirements. See the 
box in which the scanner shipped. If you do not have enough hard disk space, 
remove unnecessary files or install the software on a different disk drive.

●

If using a SCSI cable, make sure you installed the scanning software BEFORE 
you connected the scanner. If not, uninstall the software and disconnect the 
SCSI cable. Then, reinstall the software before reconnecting the SCSI cable.

●

If you received a message like “Destination Directory Is Invalid” or “Program 
Folder Is Invalid” during installation, type a valid destination folder, find a valid 
folder by clicking Browse, or restore the defaults. The destination folder name 
cannot contain the following characters: /, \, :, ?, *,<, >, “, or |.