There it is!PENCIL MOD!!!
It has happened to me too something similar.The card was unstable on cod4 and crashed after 3 minutes of play.I run it on 1,34volts and guess what?I measured the vcore and it was 1,24!!!The pencil is removed through time of palying due to air movement mostly and u have to reshade the resistor!After i did this it works great again at 1,34.So in your case there must have been sunned removement of pencil from the resistor and the card coldnt even boot.I t might have been posible to reshade and make it work again!!!Did u try that?