I think you problem may lye with the socket you have plugged the Power/Eject cable into !
Although the lead is colour RED that dont mean it goes into the red socket on the Xecuter 3 !!!!!
I found this the hard way and it seems you mat have too. I then tried to rectify the problem by replacing the lead into the correct port on the X3 and found I had blown up my Power/Eject button

. I know this because i rebuilt the console and it wont start from the Power or the eject buttons. although when connected to my other consoles P/E button it works fine.
Check where you connected the leads m8. Hope your P/E buttons r ok.
And Team Xecuter plz Colour code the wires to the sockets for people like us lol
Good Luck all

Witsebadman