To know how to reset HP 2515 printer to factory settings, follow the steps appropriately mentioned. Firstly, if the HP 2515 printer is turned on, disconnect the power cord from the printer. After this, unplug the power cord from the wall outlet. After that, wait for 15 to 20 seconds and plug the power cord back into the wall outlet. Here, reconnect the power cord to the printer and turn on your HP 2515 printer. With this, your printer is back to its factory default settings. https://connectmyprinter.com/how-can-i-reset-my-hp-printer/