Hello and thank you for choosing JA for your support needs. Sorry for the trouble. Please do the following;
Reset the product
Press the Power button () to turn on the product.
Disconnect the USB cable from the back of the product.
Disconnect the power cord from the electrical outlet.
Disconnect the power cord from the product.
Wait 5 minutes.
Reconnect the power cord to the electrical outlet.
Reconnect the power cord to the product.
Reconnect the USB cable to the product.
Check the product control panel to see if the error message still displays.
Ok, please follow the link to HP's resolution steps: