If you HP 4600/4650 printer is giving you a bit of stick then it might be a good idea to perform a “cold reset”.
This can be acheived by doing the following.
Power off the printer (duh!)
Press and hold the green checkmark button.
Turn on the printer and continue to hold down the button.
The printer should make its usual whirring sounds and will eventually come to a point where all three indicator lights are solidly lit up. When you reach this point release the button. Use the arrows to navigate down the menu to “cold reset” and press the green checkmark button.
The printer will perform a “cold reset” and should hopefully be free from any minor glitches.