Pioneer PDP 504HDE help

[netdent]

Hi guys I'm new here, hope this site can help with my hobby repairing flat tv's

Ok I have the above pioneer screen that had a fault trouble is I triggered the trap switch and the screen is locked

I do not have remote control or media box, is there anything I can do to unlock the screen?

Any help apreciated been stuck on this for ages

thanks Ronnie