Got the same issue at the back of CPU and got shorted Caps. If i remove the shorted Caps will it work just like yours by removing some shorted caps? Also, can you pinpoint which caps has shorted and which one did you only remove.
If anyoneever encounter this problem. Just pres and hold the powerbotton for 20sec and then pres again to poweron. It works everytime if my switch turn to black screen.