Problem with DVDR615

My nephew got ahold of my controller and went into the menu and locked the display out. I have sound with no picture. All of the cords are correctly connected. Before I ship it out, after much frustration. Is there a way to reset the dvdr back to the factory settings using the controller. I know some can be reset…just wondered if this was one of them…thanks…

I’ve a similar model DVDR615/75 with the same problem, I had to reboot my player into factory mode by: disconnecting the player AC chord , press and hold the front power/standby button, while reconnecting the power chord, when " display lights up" enter your regional setting codes, plus general setup.
Hope this is helpful Boyne.