A2251 (820-01949) stuck in 12.76V power loop with suspected shorted SSD rail

[2informaticos]

Having short to ground on 2 different power rails, points to NANDs, or U9000.
Remove L/R9030 and check again in diode mode at C9030.
If still short, dead NANDs.

BTW, connect ALWAYS red probe to ground when checking in diode mode; you will never get OL reading!