There was a power outage today and my HP 7410 will not turn off or on, it just shows the HP logo with a line moving back and forth like it is warming up. Can someone help me with this problem? I unplugged it but that did not solve the problem.
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I would try resetting the power supply. You can do this by unplugging the power adapter cable from the wall outlet. Unplug the other end from the printer. Unplug the power cable portion from the rectangular power adapter. You should be left with a power cord, a power adapter, and a printer; All three are not plugged into anything. Leave it this way for 30 secs, then retry the turn-on process after plugging the cords back into where they belong. Also, try plugging straight into a wall outlet, and not into a surge protector.
If this is not working still, double check the outlet in question by testing it with an appliance like a hair dryer or lamp.
This was solved really well on this blog. It is some problem with the wifi board. If you disconnect it (no so hard and well explained on the blog) you will have network printing over a cable but no wireless.
Disconnect the power cord from the back of the product.
Disconnect the power cord from the electrical outlet, and then wait 60 seconds.
Connect the power cord to the electrical outlet.
Connect the power cord to the back of the product.
Press the Power button to turn on the product.If the issue still persists perform the partial reset steps:
Perform a partial reset on the printer. To do this first remove the power supply from the back of the printer. With the power off press and hold the # and 3 keys.
Plug the power back into the printer, keep holding the # and 3 keys till you see “ Partial Reset ” displayed on the printer screenIf the issue still persists, perform the semi full reset of the printer.
Perform a partial reset on the printer. To do this first remove the power supply from the back of the printer. With the power off press and hold the # and 6 keys.
Plug the power back into the printer, keep holding the # and 6 keys till you see “ Semi Full or Semi NVM ” displayed on the printer screen.
remove the power cable directly from the back of the printer, press and hold # and 9 while holding both these buttons put the power cable back to the printer. now let the buttons go when the on light starts flashing