Chapter 12

Try removing the splitter and connecting the HP All-in-One directly to the telephone wall jack.

Cause: You are not using a proper grounded power outlet for the HP All-in-One.

Solution: Try connecting to another power outlet.

The fax test failed

If you tried to run the fax test from your computer and the fax test failed to run, the HP All-in-One might be busy with another task or have an error condition preventing it from running the fax test.

What to check

The HP All-in-One is set up properly, connected to a power supply, and is connected to your computer. For more information on setting up the HP All-in- One, see the Setup Poster that came with the HP All-in-One.

The HP All-in-One is turned on. If it is not, press the Power button to turn on the HP All-in-One.

The print cartridges are installed correctly, the print carriage is not blocked, and the print cartridge door is closed.

The HP All-in-One is not currently busy with another task such as aligning the print cartridges. Check the display. If the HP All-in-One is busy, wait until it completes the current task and run the fax test again.

The rear door is attached to the back of the HP All-in-One.

There are no error messages on the display. If there is an error message, resolve the problem and run the fax test again.

If you run the fax test and the HP All-in-One reports that the test failed, read the following information carefully to determine how to correct any problems with your fax setup. Different portions of the fax test might fail for different reasons.

Cause: The "Fax Hardware Test" failed.

214 Troubleshooting

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HP J5788, J5780, J5750, J5740 manual Fax test failed, What to check

J5788, J5740, J5780, J5750 specifications

The HP J5780 is a versatile all-in-one inkjet printer that combines printing, scanning, copying, and faxing capabilities in a single device. Ideal for home and small office environments, this printer is designed to cater to a wide range of document-related needs. Its compact form factor allows it to fit easily into tight spaces without sacrificing functionality.

One of the standout features of the HP J5780 is its print quality. With a maximum resolution of up to 4800 x 1200 optimized dpi, it delivers sharp text and vibrant images, making it suitable for printing everything from documents to photos. The printer uses HP's patented Thermal Inkjet Technology, which ensures precise ink placement and excellent color accuracy.

In terms of print speed, the HP J5780 is efficient, capable of printing up to 30 pages per minute for black and white documents and around 23 pages per minute for color prints. This speed makes it particularly effective in busy office environments where time is of the essence. The device has a 100-sheet paper tray that accommodates various paper sizes and types, including envelopes, glossy photo paper, and legal-sized documents.

The scanner function offers a flatbed design with a 1200 x 2400 dpi optical resolution, enabling users to digitize documents and photos with exceptional clarity. Additionally, the HP J5780 comes with a built-in copier that allows for quick duplication of documents without needing a computer. Users can efficiently make multiple copies, adjust copy sizes, and utilize features like resizing and reduction.

Another important aspect of the HP J5780 is its faxing capability. Featuring a 33.6 Kbps modem, the printer enables quick transmission of documents and comes with a 20-page automatic document feeder (ADF), simplifying the process of sending multi-page faxes.

Connectivity options on the HP J5780 are user-friendly, offering both USB and Ethernet interfaces. This allows for easy connection to computers and networks, enabling users to share the printer within a group. Furthermore, the device is compatible with various operating systems, ensuring seamless integration into different computing environments.

In summary, the HP J5780 is a comprehensive all-in-one solution that emphasizes productivity without compromising quality. Its combination of printing, scanning, copying, and faxing functionalities, along with its user-friendly features, makes it a reliable choice for those seeking efficiency and versatility in their document management tasks. Whether for home use or small office settings, the HP J5780 delivers dependable performance and a range of technologies designed to meet diverse printing needs.