HP J5780 User Guide - Macintosh - Page 260
Power and connection messages, Communication test failed, HP All-in-One not found
UPC - 882780940253
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Chapter 11 Power and connection messages The following is a list of power- and connection-related error messages: • Communication test failed • HP All-in-One not found • Improper shutdown • Two-way communication lost Communication test failed Cause: The HP All-in-One is turned off. Solution: Look at the display on the HP All-in-One. If the display is blank and the Power button is not lit, the HP All-in-One is turned off. Make sure the power cord is firmly connected to the HP All-in-One and plugged into a power outlet. Press the Power button to turn on the HP All-in-One. Cause: The HP All-in-One is not connected to the computer. Solution: If the HP All-in-One is not properly connected to the computer, communication errors can occur. Make sure the USB cable is securely connected to the HP All-in-One and the computer, as shown below. HP All-in-One not found Cause: The USB cable is not plugged in properly. 258 Troubleshooting