Chapter 12

Solution:

Make sure the power cord is firmly connected to both the HP All-in-One and the power adapter. Plug the power cord into a grounded power outlet, surge protector, or power strip.

1Power connection

2Power cord and adapter

3Grounded power outlet

If you are using a power strip, make sure the power strip is on. Or, try plugging the HP All-in-One directly into a grounded power outlet.

Test the power outlet to make sure it is working. Plug in an appliance that you know works, and see if the appliance has power. If not, then there might be a problem with the power outlet.

If you plugged the HP All-in-One into a switched outlet, make sure the switch is on. If it is switched to on but still does not work, then there might be a problem with the power outlet.

Cause: You pressed the Power button too quickly.

Solution: The HP All-in-One might not respond if you press the Power button too quickly. Press the Power button once. It might take a few minutes for the HP All-in- One to turn on. If you press the Power button again during this time, you might turn the device off.

CAUTION: If the HP All-in-One still does not turn on, it might have a mechanical failure. Unplug the HP All-in-One from the power outlet and contact HP. Go to: www.hp.com/support. If prompted, choose your country/region, and then click Contact HP for information on calling for technical support.

124 Troubleshooting

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HP J5750, J5788, J5780, J5740 manual Solution

J5788, J5740, J5780, J5750 specifications

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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.

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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.