Chapter 5

a.Click Start, click Settings, and then click Control Panel. (In Windows XP, click Start, and then click Control Panel.)

b.Click Add/Remove Programs (in Windows XP, click Add or Remove Programs), and then select the HP Scanjet software.

c.Click Remove.

5.Reinstall using the HP Smart Document Scan Software CD that came with your scanner. When you insert the CD, an installation dialog box launches automatically.

Check the cables

Cable type

Action

 

 

Power supply

The power supply has an attached cable that plugs into the back

 

of the scanner. The connector on the end of this cable has a

 

green LED that is on when the power supply is functioning

 

correctly.

 

The power supply also has an AC cable that is connected to the

 

power supply on one end and plugged into a power outlet or

 

surge protector on the other end.

 

1.

Check that the green LED on the power supply cable

 

 

connector is on.

 

2.

If the green LED is not on, ensure that power is available to

 

 

the power outlet or surge protector that the AC cable is

 

 

plugged into.

 

3.

If power is available to the power outlet or surge protector

 

 

but the green LED is still not on, the power supply might be

 

 

defective. Contact HP Support for assistance.

 

 

USB cable

The USB cable is connected between the scanner and the

 

computer.

 

●

Use the cable that was included with the scanner. Another

 

 

USB cable might not be compatible with the scanner.

 

●

Ensure that the USB cable is securely connected between

 

 

the scanner and the computer.

 

For additional USB troubleshooting information, see

 

www.hp.com/support, select your country/region, and then use

 

the search tool to find USB troubleshooting topics.

Scanner operation problems

●Scanner will not turn on

●Scanner lamp stays on

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HP Scanjet 7800 Scanner