09-10-2019 08:44 PM
Touch screen on HP Envy 7640 Printer stopped working
Solved! Go to Solution.
09-13-2019 11:19 AM
Welcome to the HP Support Community.
Try these steps to reset the printer -
1) Take out the cartridges.
2) Unplug the power cord from the printer & wall.
3) Wait for 30 seconds.
4) Plug the power cord back into the printer and wall, ensure the printer is plugged into the wall & not to a surge protector.
5) Insert the cartridges back into the printer.
Also, try updating the printer's firmware. Download and install the firmware from this link.
Hope this helps! Keep me posted.
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