I have this kind of issue. But first it booted to hekate and when I'm creating an Emummc file from 30% while creating emummc i heard the fan turning rapidly and i pay no attention as i thought it was normal then suddenly turnoff when it was almost 60%, the modchip blinks blue then green I...
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.