If a program has frozen, close it. Press CTRL+ALT+DELETE to open Close Programs or Task Manager. Select any program listed as Not Responding and click End Task.
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.
Make sure the scanner is unlocked. Move the lock to the unlocked position. (Some models only, see "Front panel and accessories comparisons" on page 3.)
Check that the interface cable is securely connected between the scanner and the computer.
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 power cable is securely connected between the scanner and a live electrical outlet or surge protector.
Cleaning and maintaining the scanner and accessories. See "Cleaning and maintaining" on page 105.
Clearing jams from the ADF. See "Clearing jams from the ADF" on page 102.
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 page 85.

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85

Troubleshooting and maintaining

This section provides information for:

Checking the basics

￿￿￿See the Setup and Support Guide for installation and troubleshooting information.

If the scanner is not working, always perform these actions first.

￿￿￿￿￿￿If these steps did not resolve the issue, see "Starting troubleshooting" on page 86.

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HP 4400C manual Troubleshooting and maintaining, Checking the basics

4400C specifications

The HP 4400C and HP 5400C are well-regarded models in the realm of HP’s multifunctional printer offerings, establishing themselves as reliable devices for both personal and small office use. These printers blend advanced technology with user-friendly features, setting high standards in the printing industry.

One of the standout features of the HP 4400C is its impressive print resolution, capable of producing vibrant and sharp documents and images at up to 1200 x 1200 dpi. This ensures that every printout boasts clarity and detail, making it an excellent choice for professionals who demand high-quality output in their everyday tasks. The device supports a variety of paper sizes and types, providing versatility for different printing needs.

In terms of printing speed, the HP 4400C achieves output rates of up to 24 pages per minute for black-and-white documents, and approximately 20 pages per minute for color prints. This rapid performance helps enhance productivity, especially in busy office environments. The HP 5400C, on the other hand, offers similar speeds but is enhanced with features that cater to larger workgroups, making it ideal for more demanding printing environments.

Both models support versatile connectivity options, including USB and Ethernet, allowing seamless integration into existing networks. The intuitive control panel and LCD screen enhance user experience, making it easy to navigate settings and monitor print jobs.

Security is also a crucial aspect of these printers, with options for secure printing and job encryption, ensuring sensitive documents remain confidential. The HP 4400C and 5400C are equipped with HP’s advanced paper handling capabilities, featuring multiple input trays that can handle various media types, including envelopes and labels.

In summary, the HP 4400C and HP 5400C multifunction printers offer a robust combination of high-quality printing, speed, and versatility. Their advanced features make them suitable for a range of workflows, from personal use to larger organizational needs, thereby catering to a broad audience. By integrating modern technologies and user-oriented designs, these printers stand out as reliable choices for efficient document management and production.