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get error 6 on DFU.
i sew water damage under U9080 clean and reball.
all the ssd voltage are pulsing from the correct voltage to 0v.
diode mode on PP2V5_NAND_SSD0-PP2V5_SW2_TPS62180_SSD0 - 060
PPBUS_G3H_SSD0 - 430
060 is very low.
You should get similar readings like the other SSD channel.
Corrosion under U9080 caused leakage from PPBUS_G3H to 2V5_NAND_SSD0 power rail.
Difficult to find the culprit, as you don't have a pure short there.
Just in case, remove the filter caps.