HP 7400C Series - Manual (Page 75)

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Troubleshooting usage and maintaining
This section provides information for:
● Solving issues that might occur while using the scanner or
HP scanning software, or issues with the appearance of scanned
images. Start with
“Checking the basics” on this page .
● Setting scanner lamp controls. See "Setting scanner lamp controls"
on page 92 .
● Clearing jams from the ADF. See "Clearing jams from the ADF" on
page 93 .
● Cleaning and maintaining the scanner and accessories. See
"Cleaning and maintaining" on page 95 .
For issues that occur during installation or the first time you scan, see
the
Setup and Support Guide .
Checking the basics
If the scanner is not working, always perform these actions first.
● Check that the power cable is securely connected between the
scanner and a live electrical outlet or surge protector.
● If the power cable is connected to a surge protector, make sure the
surge protector is plugged into an outlet and turned on.
● Check that the USB or SCSI cable is securely connected between
the scanner and the computer.
● 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 to the
scanner and then turn on the computer, in that order.
● If a program has frozen, close it. Press O PTION + C OMMAND + E SC ,
and then click Force Quit.
If these steps did not resolve the issue, see "Starting troubleshooting"
on page 76 .